词根：-vac-, -vacu-, -van-, -void-

【词根含义】：空

【词根来源】：-vac-来源于拉丁语动词vac.o, vac.are, vac.avi, vac.atum(空);-vacu-来源于拉丁语动词vacuo, -are, -avi, -atus(使空); -van-来源于拉丁语形容词van.us, van.a, van.um(空);-void-来源于古法语vuide(空的)。均可追溯至原始印欧语wan-(缺乏的)。

【同源单词】：vacancy, vacant, vacate, vacation, vacationist

前缀：e-, ex-

【词根含义】：出,向外;向上

【词根来源】：e-用在b, c, d, g, j, l, m, n, r, v前;ex-用在s前时,s常省略。来源于拉丁语前缀ex-。

【同源单词】：edit, edition, editor, editorial, educate

词根词缀：-ent

【来源及含义】Latin: adjective suffix signifying action or being; performing a particular acion

【同源单词】abducent, abhorrent, abluent, absorbefacient, absorbifacient, abstinent

词根词缀：-esce, -escent, -escence

【来源及含义】Latin: beginning to be, becoming; to be somewhat; a suffix that forms nouns and adjectives

【同源单词】acaulescent, acquiescence, acquiescent, adherescent, adipescent, adolescence

词根词缀：vane-, vani-

【来源及含义】Latin: to vanish, to disappear, to fade, to become empty

【同源单词】evanescent, evanish, vain, vainglorious, vaingloriously, vaingloriousness