| cruddy | (adjective) characterized by obscenity | Synonyms: filthy, foul, nasty, smutty |
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| crude | (adjective) not refined or processed | Synonyms: unprocessed, unrefined |
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| (adjective) belonging to an early stage of technical development; characterized by simplicity and (often) crudeness | Synonyms: primitive, rude |
| (adjective) conspicuously and tastelessly indecent | Synonyms: earthy, gross, vulgar |
| (adjective) not processed or subjected to analysis | Synonyms: raw |
| (adjective) devoid of any qualifications or disguise or adornment | Synonyms: blunt, stark |
| (adjective) not carefully or expertly made | Synonyms: rough |
| drudging | (adjective) doing arduous or unpleasant work | Synonyms: laboring, labouring, toiling |
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| erudite | (adjective) having or showing profound knowledge | Synonyms: learned |
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| grudging | (adjective) petty or reluctant in giving or spending | Synonyms: niggardly, scrimy |
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| (adjective) of especially an attitude | - |
| imprudent | (adjective) not prudent or wise | - |
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| (adjective) lacking wise self-restraint | - |
| intruding | (adjective) projecting inward | - |
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| jurisprudential | (adjective) relating to the science or philosophy of law or a system of laws | - |
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| protruding | (adjective) extending out above or beyond a surface or boundary | Synonyms: jutting, projected, projecting, relieved, sticking, sticking out |
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| prudent | (adjective) careful and sensible; marked by sound judgment | - |
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| prudential | (adjective) arising from or characterized by prudence especially in business matters | - |
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| prudish | (adjective) exaggeratedly proper | Synonyms: priggish, prim, prissy, puritanical, square-toed, straight-laced, straightlaced, strait-laced, straitlaced, tight-laced, victorian |
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| recrudescent | (adjective) the revival of an unfortunate situation after a period of abatement | - |
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| rudderless | (adjective) aimlessly drifting | Synonyms: adrift, afloat, aimless, directionless, planless, undirected |
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| ruddy | (adjective) of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies | Synonyms: blood-red, carmine, cerise, cherry-red, cherry, crimson, red, reddish, ruby-red, ruby, scarlet |
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| (adjective) inclined to a healthy reddish color often associated with outdoor life | Synonyms: florid, rubicund, sanguine |
| rude | (adjective) lacking civility or good manners | Synonyms: uncivil |
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| (adjective) belonging to an early stage of technical development; characterized by simplicity and (often) crudeness | Synonyms: crude, primitive |
| (adjective) socially incorrect in behavior | Synonyms: bad-mannered, ill-mannered, unmannered, unmannerly |
| (adjective) (used especially of commodities) being unprocessed or manufactured using only simple or minimal processes | Synonyms: natural, raw |
| (adjective) (of persons) lacking in refinement or grace | Synonyms: bounderish, ill-bred, lowbred, underbred, yokelish |
| rudimentary | (adjective) being or involving basic facts or principles | Synonyms: fundamental, underlying |
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| (adjective) being in the earliest stages of development | - |
| (adjective) not fully developed in mature animals | Synonyms: vestigial |
| ungrudging | (adjective) without envy or reluctance | - |
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