the remnants of a liquid left in a container, together with any sediment or grounds 残渣,残滓 coffee dregs. 咖啡残渣。 ■(figurative)the most worthless part or parts of something (喻)渣滓 the dregs of society. 社会渣滓。
派生 dreggy adjective 语源
Middle English: probably of Scandinavian origin and related to Swedish drägg (plural)