| auscultatory | (adjective) of or relating to auscultation | - |
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| auspicious | (adjective) auguring favorable circumstances and good luck | - |
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| austenitic | (adjective) composed of austenite | - |
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| austere | (adjective) practicing great self-denial | Synonyms: ascetic, ascetical, spartan |
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| (adjective) of a stern or strict bearing or demeanor; forbidding in aspect | Synonyms: stern |
| (adjective) severely simple | Synonyms: severe, stark, stern |
| austral | (adjective) of the south or coming from the south | - |
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| australopithecine | (adjective) of or belonging to the hominid genus Australopithecus | - |
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| banausic | (adjective) (formal) ordinary and not refined | - |
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| causal | (adjective) involving or constituting a cause; causing | - |
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| causative | (adjective) producing an effect | - |
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| causeless | (adjective) having no cause or apparent cause | Synonyms: fortuitous, uncaused |
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| (adjective) having no justifying cause or reason | Synonyms: reasonless |
| caustic | (adjective) of a substance, especially a strong acid; capable of destroying or eating away by chemical action | Synonyms: corrosive, erosive, mordant, vitriolic |
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| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, acrid, bitter, blistering, sulfurous, sulphurous, virulent, vitriolic |
| clausal | (adjective) of or relating to or functioning as a clause | - |
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| claustrophobic | (adjective) suffering from claustrophobia; abnormally afraid of closed-in places | - |
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| (adjective) uncomfortably closed or hemmed in | - |
| exhausted | (adjective) depleted of energy, force, or strength | Synonyms: spent |
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| (adjective) drained physically | - |
| (adjective) drained of energy or effectiveness; extremely tired; completely exhausted | Synonyms: dog-tired, fagged, fatigued, gone, played out, spent, washed-out, worn-out, worn out |
| exhaustible | (adjective) capable of being used up | - |
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| (adjective) capable of being used up; capable of being exhausted | - |
| exhausting | (adjective) having a debilitating effect | Synonyms: draining |
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| (adjective) producing exhaustion | Synonyms: tiring, wearing, wearying |
| exhaustive | (adjective) performed comprehensively and completely; not superficial or partial | Synonyms: thorough, thoroughgoing |
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| implausible | (adjective) having a quality that provokes disbelief | - |
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| inauspicious | (adjective) not auspicious; boding ill | Synonyms: unfortunate |
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| (adjective) contrary to your interests or welfare | Synonyms: adverse, untoward |
| (adjective) presaging ill fortune | Synonyms: ill, ominous |
| inexhaustible | (adjective) incapable of being entirely consumed or used up | - |
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| (adjective) that cannot be entirely consumed or used up | Synonyms: unlimited |
| menopausal | (adjective) of or relating to the menopause | - |
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| nauseated | (adjective) feeling nausea; feeling about to vomit | Synonyms: nauseous, queasy, sick, sickish |
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| nauseating | (adjective) causing or able to cause nausea | Synonyms: loathsome, nauseous, noisome, offensive, queasy, sickening, vile |
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| nauseous | (adjective) feeling nausea; feeling about to vomit | Synonyms: nauseated, queasy, sick, sickish |
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| (adjective) causing or able to cause nausea | Synonyms: loathsome, nauseating, noisome, offensive, queasy, sickening, vile |
| noncausal | (adjective) not causative | Synonyms: noncausative |
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| noncausative | (adjective) not causative | Synonyms: noncausal |
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| plausible | (adjective) apparently reasonable and credible, and therefore convincing | - |
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| (adjective) given to or characterized by presenting specious arguments | - |
| plausive | (adjective) expressing or manifesting praise or approval | Synonyms: affirmative, approbative, approbatory, approving |
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| postmenopausal | (adjective) subsequent to menopause | - |
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| premenopausal | (adjective) prior to menopause | - |
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| uncaused | (adjective) having no cause or apparent cause | Synonyms: causeless, fortuitous |
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| unexhausted | (adjective) not used up completely | - |
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