词根词缀：aqua-, aquatic-, aqui-, aqu-, -aquatically, aque-, -aqueous

【来源及含义】Latin: water, watery solution

【相关词根词缀】 Cross references of word families that refer to "water": hydat-; hydro-; hygro-.

【同源单词】alluvial aquifer, aqua, aqua exclusa, aqua potabile, aqua regia, aqua weed cutter

词根词缀：opaqu-

【来源及含义】Latin: not transparent nor translucent, not clear, unable to shine through; shaded, shady; dark; no luster; not clearly understood or expressed

【同源单词】electron opaque tracer, Isopaque, nonopaque, opacity, opaque projector, opaque