dilute

1 not containing very much of some important element a dilute acid that's safe to handle in the classroom Synonyms weak, diluted, thin, thinned, washy, watery, weakenedRelated Words adulterated, watered-downNear Antonyms enriched, fortified; concentrated, condensed, evaporatedAntonyms full-bodied, rich, strong

2 containing foreign or lower-grade substances a dilute solution of ammonia Synonyms adulterate, adulterated, alloyed, contaminated, impure, diluted, polluted, tainted, thinned, weakenedRelated Words unclarified, unfiltered, unrefined; befouled, begrimed, bemired, besmirched, corrupted, debased, defiled, dirtied, fouled, maculate (or maculated), soiled, spoiled, sullied; blended, commingled, incorporated, intermingled, intermixed, merged, mingled, mixed; coalesced, combined, compounded; cheapened, doctoredNear Antonyms clarified, filtered, purified, refined, ultrarefined; neat, plain, straight; concentrated, strong; uncombined; pasteurized; sterile, sterilized; clean, immaculate, spotless, stainless, unsoiled, unsulliedAntonyms fine, pure, ultrapure, unadulterated, unalloyed, uncontaminated, uncut, undiluted, unmixed, unpolluted, untainted

to alter (something) for the worse with the addition of foreign or lower-grade substances the pharmacist was convicted of diluting prescription drugs in order to increase profits Synonyms cut, adulterate, extend, lace, sophisticate, thin, water down, weakenRelated Words load; befoul, contaminate, corrupt, defile, dirty, envenom, foul, infect, poison, pollute, soil, spoil, sully, taint; cheapen, debase, degrade; manipulate, misrepresent, tamper (with); counterfeit, fake, falsify, fudge; doctor, spike; attenuate, moderate, qualify, temperNear Antonyms fertilize, lard; augment, reinforce (also reenforce), supplement; decontaminate, purify; clarify, clean, cleanse, distill (also distil), filter, flush, leach, pasteurize, purge, refine; better, enhance, improve; compact, concentrate, condenseAntonyms enrich, fortify, richen, strengthen