词根词缀：ceno-, caeno-, keno-, ken-; -cenosis

【来源及含义】Greek: empty; removal [medical discharge or evacuation]

【相关词根词缀】Related "empty, vacant" word units: vacu-; void.

【同源单词】cenophobia, cenotaph, cenotaphic, hydrocenosis, hypercenosis, kenkosis

词根词缀：hydro-, hydra-, hydr-, hyd-

【来源及含义】Greek: water

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

【同源单词】ahydrotaxis, anhydrase, anhydration, anhydride, anhydrobiosis, anhydrous