| hypaethral | (adjective) partly or entirely open to the sky | Synonyms: hypethral |
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| idiopathic | (adjective) (of diseases) arising from an unknown cause | - |
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| impacted | (adjective) wedged or packed in together | Synonyms: wedged |
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| impaired | (adjective) diminished in strength, quality, or utility | - |
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| (adjective) mentally or physically unfit | Synonyms: afflicted |
| impalpable | (adjective) imperceptible to the senses or the mind | - |
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| (adjective) incapable of being perceived by the senses especially the sense of touch | Synonyms: intangible |
| (adjective) not perceptible to the touch | - |
| imparipinnate | (adjective) (a leaf shape) pinnate with a single leaflet at the apex | Synonyms: odd-pinnate |
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| impartial | (adjective) showing lack of favoritism | - |
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| (adjective) free from undue bias or preconceived opinions | Synonyms: unprejudiced |
| impassable | (adjective) incapable of being passed | Synonyms: unpassable |
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| impassioned | (adjective) characterized by intense emotion | Synonyms: ardent, fervent, fervid, fiery, perfervid, torrid |
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| impassive | (adjective) deliberately impassive in manner | Synonyms: deadpan, expressionless, poker-faced, unexpressive |
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| (adjective) having or revealing little emotion or sensibility; not easily aroused or excited | Synonyms: stolid |
| impatient | (adjective) restless or short-tempered under delay or opposition | - |
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| (adjective) (usually followed by `to') full of eagerness | Synonyms: raring |
| incapable | (adjective) (followed by `of') lacking capacity or ability | - |
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| (adjective) (followed by `of') not having the temperament or inclination for | - |
| (adjective) not meeting requirements | Synonyms: incompetent, unequal to |
| (adjective) not being susceptible to or admitting of something (usually followed by `of') | - |
| incapacitated | (adjective) lacking in or deprived of strength or power | Synonyms: helpless |
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| incapacitating | (adjective) that cripples or disables or incapacitates | Synonyms: crippling, disabling |
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| incomparable | (adjective) such that comparison is impossible; unsuitable for comparison or lacking features that can be compared | Synonyms: uncomparable |
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| incompatible | (adjective) used especially of drugs or muscles that counteract or neutralize each other's effect | Synonyms: antagonistic |
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| (adjective) not compatible | - |
| (adjective) incapable of being used with or connected to other devices or components without modification | - |
| (adjective) not suitable to your tastes or needs | Synonyms: uncongenial |
| (adjective) of words so related that one contrasts with the other | Synonyms: contrastive |
| (adjective) used especially of solids or solutions; incapable of blending into a stable homogeneous mixture | - |
| (adjective) not in keeping with what is correct or proper | Synonyms: inappropriate, out of keeping, unfitting |
| (adjective) not compatible with other facts | Synonyms: discrepant |
| (adjective) not easy to combine harmoniously | Synonyms: ill-sorted, mismated, unsuited |
| inculpable | (adjective) free of guilt; not subject to blame | Synonyms: blameless, irreproachable, unimpeachable |
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| inculpative | (adjective) causing blame to be imputed to | Synonyms: inculpatory |
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| inculpatory | (adjective) causing blame to be imputed to | Synonyms: inculpative |
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| inescapable | (adjective) impossible to avoid or evade | Synonyms: ineluctable, unavoidable |
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| inextirpable | (adjective) incapable of extermination or extirpation | Synonyms: inexterminable |
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| inseparable | (adjective) not capable of being separated | - |
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| interdepartmental | (adjective) between or among departments | - |
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| intradepartmental | (adjective) within a department | - |
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| irreparable | (adjective) impossible to repair, rectify, or amend | - |
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| menopausal | (adjective) of or relating to the menopause | - |
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| metacarpal | (adjective) of or relating to the metacarpus | - |
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| multiparous | (adjective) producing more than one offspring at a time | - |
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| multipartite | (adjective) involving more than two parties | - |
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| municipal | (adjective) relating or belonging to or characteristic of a municipality | - |
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| (adjective) of or relating to the government of a municipality | - |
| myopathic | (adjective) of or relating to any disease of the muscles that is not caused by nerve dysfunction | - |
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| nonparallel | (adjective) of or relating to the sequential performance of multiple operations | Synonyms: in series, serial |
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| (adjective) (of e.g. lines or paths) not parallel; converging | - |
| nonparametric | (adjective) not involving an estimation of the parameters of a statistic | - |
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| nonparasitic | (adjective) not parasitic on another organism | Synonyms: free-living, nonsymbiotic |
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| nonpareil | (adjective) eminent beyond or above comparison | Synonyms: matchless, one, one and only, peerless, unmatchable, unmatched, unrivaled, unrivalled |
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| nonparticulate | (adjective) not composed of distinct particles | - |
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| nonpartisan | (adjective) free from party affiliation or bias | Synonyms: nonpartizan |
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| nonpartizan | (adjective) free from party affiliation or bias | Synonyms: nonpartisan |
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| nonpasserine | (adjective) relating to or characteristic of birds that are not perching birds | - |
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| nonspatial | (adjective) not spatial | - |
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| occupational | (adjective) of or relating to the activity or business for which you are trained | - |
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| opalescent | (adjective) having a play of lustrous rainbow colors | Synonyms: iridescent, nacreous, opaline, pearlescent |
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| opaline | (adjective) having a play of lustrous rainbow colors | Synonyms: iridescent, nacreous, opalescent, pearlescent |
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| opaque | (adjective) not transmitting or reflecting light or radiant energy; impenetrable to sight | - |
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| (adjective) hard or impossible to understand | Synonyms: unintelligible |
| orthopaedic | (adjective) of or relating to orthopedics | Synonyms: orthopedic, orthopedical |
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| oviparous | (adjective) egg-laying | - |
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| ovoviviparous | (adjective) producing living young from eggs that hatch within the body | - |
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| pachydermal | (adjective) of or relating to or characteristic of pachyderms | Synonyms: pachydermatous, pachydermic, pachydermous |
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| pachydermatous | (adjective) of or relating to or characteristic of pachyderms | Synonyms: pachydermal, pachydermic, pachydermous |
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| (adjective) emotionally hardened | Synonyms: callous, indurate |
| pachydermic | (adjective) of or relating to or characteristic of pachyderms | Synonyms: pachydermal, pachydermatous, pachydermous |
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| pachydermous | (adjective) of or relating to or characteristic of pachyderms | Synonyms: pachydermal, pachydermatous, pachydermic |
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| pacific | (adjective) promoting peace | - |
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| (adjective) disposed to peace or of a peaceful nature | Synonyms: peaceable |
| pacifist | (adjective) opposed to war | Synonyms: dovish, pacifistic |
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| pacifistic | (adjective) opposed to war | Synonyms: dovish, pacifist |
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| packable | (adjective) capable of being packed | - |
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| packaged | (adjective) enclosed in a package or protective covering | - |
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| packed | (adjective) pressed together or compressed | - |
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| (adjective) extremely crowed or filled to capacity | Synonyms: jam-packed, jammed |
| padded | (adjective) softened by the addition of cushions or padding | Synonyms: cushioned, cushiony |
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| paederastic | (adjective) of homosexuality between a man and a boy | Synonyms: pederastic |
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| paediatric | (adjective) of or relating to the medical care of children | Synonyms: pediatric |
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| pagan | (adjective) not acknowledging the God of Christianity and Judaism and Islam | Synonyms: ethnic, heathen, heathenish |
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| paid | (adjective) marked by the reception of pay | - |
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| (adjective) involving gainful employment in something often done as a hobby | Synonyms: nonrecreational |
| (adjective) yielding a fair profit | Synonyms: gainful, paying |
| pained | (adjective) emotionally hurt or upset or annoyed | Synonyms: injured, offended |
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| painful | (adjective) causing physical or psychological pain | - |
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| (adjective) exceptionally bad or displeasing | Synonyms: abominable, atrocious, awful, dreadful, terrible, unspeakable |
| (adjective) causing physical discomfort | Synonyms: irritating |
| (adjective) causing misery or pain or distress | Synonyms: afflictive, sore |
| painless | (adjective) not causing physical or psychological pain | - |
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| (adjective) requiring little hard work or exertion | - |
| painstaking | (adjective) characterized by extreme care and great effort | Synonyms: conscientious, scrupulous |
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| paintable | (adjective) lending itself to being painted | - |
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| painted | (adjective) coated with paint | - |
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| (adjective) having makeup applied | - |
| (adjective) lacking substance or vitality as if produced by painting | - |
| (adjective) having sections or patches colored differently and usually brightly | Synonyms: calico, motley, multi-color, multi-colored, multi-colour, multi-coloured, multicolor, multicolored, multicolour, multicoloured, particolored, particoloured, piebald, pied, varicolored, varicoloured |
| painterly | (adjective) having qualities unique to the art of painting | - |
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| paired | (adjective) of leaves etc; growing in pairs on either side of a stem | Synonyms: opposite |
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| (adjective) occurring in pairs or as a pair | Synonyms: mated |
| (adjective) matched for breeding | - |
| palaeolithic | (adjective) of or relating to the second period of the Stone Age (following the eolithic) | Synonyms: paleolithic |
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| palaeontological | (adjective) of or relating to paleontology | Synonyms: paleontological |
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| palatable | (adjective) acceptable to the taste or mind | Synonyms: toothsome |
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| palatal | (adjective) relating to or lying near the palate | Synonyms: palatine |
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| (adjective) produced with the front of the tongue near or touching the hard palate (as `y') or with the blade of the tongue near the hard palate (as `ch' in `chin' or `j' in `gin') | Synonyms: palatalised, palatalized |
| palatalised | (adjective) produced with the front of the tongue near or touching the hard palate (as `y') or with the blade of the tongue near the hard palate (as `ch' in `chin' or `j' in `gin') | Synonyms: palatal, palatalized |
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| palatalized | (adjective) produced with the front of the tongue near or touching the hard palate (as `y') or with the blade of the tongue near the hard palate (as `ch' in `chin' or `j' in `gin') | Synonyms: palatal, palatalised |
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| palatial | (adjective) relating to or being a palace | - |
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| (adjective) suitable for or like a palace | - |
| palatine | (adjective) of or relating to a palace | - |
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| (adjective) of or relating to a count palatine and his royal prerogatives | - |
| (adjective) relating to or lying near the palate | Synonyms: palatal |
| palatoglossal | (adjective) relating to the palate and tongue | - |
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| pale | (adjective) abnormally deficient in color as suggesting physical or emotional distress | Synonyms: pallid, wan |
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| (adjective) lacking in vitality or interest or effectiveness | Synonyms: pallid |
| (adjective) very light colored; highly diluted with white | - |
| (adjective) not full or rich | - |
| (adjective) (of light) lacking in intensity or brightness; dim or feeble | Synonyms: pallid, sick, wan |
| paleoanthropological | (adjective) of or concerned with the scientific study of human fossils | - |
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| paleocortical | (adjective) of or relating to the olfactory cortex of the cerebrum | - |
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| paleolithic | (adjective) of or relating to the second period of the Stone Age (following the eolithic) | Synonyms: palaeolithic |
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| paleontological | (adjective) of or relating to paleontology | Synonyms: palaeontological |
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| palingenetic | (adjective) of or relating to palingenesis | - |
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| palish | (adjective) slightly pale | - |
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| palliative | (adjective) moderating pain or sorrow by making it easier to bear | Synonyms: alleviative, alleviatory, lenitive, mitigative, mitigatory |
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| pallid | (adjective) abnormally deficient in color as suggesting physical or emotional distress | Synonyms: pale, wan |
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| (adjective) lacking in vitality or interest or effectiveness | Synonyms: pale |
| (adjective) (of light) lacking in intensity or brightness; dim or feeble | Synonyms: pale, sick, wan |
| pally | (adjective) (used colloquially) having the relationship of friends or pals | Synonyms: chummy, matey, palsy-walsy |
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| palmar | (adjective) relating to the palm of the hand or the sole of the foot | Synonyms: volar |
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| palmate | (adjective) of a leaf shape; having leaflets or lobes radiating from a common point | Synonyms: palm-shaped |
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| (adjective) (of the feet of water birds) having three toes connected by a thin fold of skin | - |
| palmatifid | (adjective) of a leaf shape; palmately cleft rather than lobed | - |
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| palmlike | (adjective) resembling a palm tree | - |
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| palmy | (adjective) very lively and profitable | Synonyms: booming, burgeoning, flourishing, prospering, prosperous, roaring, thriving |
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| palpable | (adjective) capable of being perceived; especially capable of being handled or touched or felt | Synonyms: tangible |
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| (adjective) so intense as to be almost touched or felt | - |
| (adjective) clearly revealed to the mind or the senses or judgment | Synonyms: apparent, evident, manifest, patent, plain, unmistakable |
| (adjective) (medicine) can be felt by palpation | - |
| palpatory | (adjective) relating to or involving palpation | - |
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| palpebrate | (adjective) having eyelids | - |
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| palpitant | (adjective) having a slight and rapid trembling motion | Synonyms: palpitating |
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| palpitating | (adjective) having a slight and rapid trembling motion | Synonyms: palpitant |
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| palsied | (adjective) affected with palsy or uncontrollable tremor | - |
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