Impure1. (a.) Not pure; not clean; tainted; dirty; foul; filthy; containing something which is unclean or unwholesome; mixed or impregnated extraneous substances; adulterated; as, impure water or air; impure drugs, food, etc.
2. (a.) Defiled by sin or guilt; unholy; unhallowed; -- said of persons or things.
3. (a.) Unchaste; lewd; unclean; obscene; as, impure language or ideas.
4. (a.) Not purified according to the ceremonial law of Moses; unclean.
5. (a.) Not accurate; not idiomatic; as, impure Latin; an impure style.
6. (v. t.) To defile; to pollute.
Thesaurus Entries
Adamic, Doric, Fescennine, Rabelaisian, adulterated, alloyed, backsliding, barbaric, barbarous, bawdy, belowstairs, besmirched, black, blemished, blue, cacophonous, carnal, clumsy, coarse, common, contaminated, corrupted, crude, damaged, debased, defective, deficient, defiled, degenerate, depraved, dirty, dissolute, doggerel, dysphemistic, erring, erroneous, evil, fallen, fallible, faulty, feculent, filthy, fleshly, forbidden, foul, foul-mouthed, foul-spoken, foul-tongued, found wanting, frail, fulsome, graceless, gross, grubby, harsh, immature, immodest, immoral, impaired, imperfect, imprecise, improper, in bad taste, inaccurate, inadequate, incomplete, inconcinnate, inconcinnous, incorrect, indecent, indecorous, inelegant, inexact, infected, infelicitous, infirm, ithyphallic, lacking, lapsed, lascivious, lecherous, lewd, libidinous, licentious, loose, low, lubricious, lubricous, lurid, lustful, maculate, makeshift, mediocre, mixed, nasty, native, nonkosher, not perfect, obscene, of easy virtue, off, offensive, outlandish, partial, patchy, peccable, polluted, pornographic, postlapsarian, prodigal, promiscuous, prurient, putrescent, putrid, raunchy, raw, recidivist, recidivistic, ribald, ritually unclean, rotten, rude, run-of-mine, salacious, scarlet, scummy, scurrile, scurrilous, sensual, short, sinful, sketchy, smirched, smoking-room, smutty, soiled, soily, squalid, sullied, sultry, tainted, tasteless, tref, unangelic, unbathed, unchaste, unclean, uncleanly, uncourtly, uncouth, undeveloped, undignified, uneuphonious, uneven, unfelicitous, unfinished, ungodly, ungood, ungraceful, ungraded, unhallowed, unholy, unperfected, unpolished, unprintable, unpure, unrefined, unrepeatable, unrighteous, unsaintly, unscoured, unscrubbed, unseemly, unsorted, unsound, unswept, unthorough, unvirginal, unvirtuous, unwashed, unwiped, vile, virtueless, vitiated, vulgar, wanting, wanton, wayward, weak, wicked