void
adj.
c.1300, "unoccupied, vacant," from Anglo-French and Old French voide, viude "empty, vast, wide, hollow, waste, uncultivated, fallow," as a noun, "opening, hole; loss," from Latin vocivos "unoccupied, vacant," related to vacuus "empty" (see vacuum, n.). Meaning "lacking or wanting" (something) is recorded from early 15c. Meaning "legally invalid, without legal efficacy" is attested from mid-15c.
n.
1610s, "unfilled space, gap," from void, adj.. Meaning "absolute empty space, vacuum" is from 1727.
v.
"to clear" (some place, of something), c.1300, from Anglo-French voider, Old French vuider "to empty, drain; to abandon, evacuate," from voide (see void, adj.); meaning "to deprive (something) of legal validity" is attested from early 14c. Related: Voided; voiding.
词根：void = empty
来自拉丁语的void意为empty,同义词根有来自拉丁语的vac,van以及来自盎格鲁-撒克逊语的wan等。
同源词：
1. devoid（完全空着的 de(=intensive) + void(=empty)）
adj.没有...的；缺乏的
The lunar landscape is devoid of color. 月球上的风景是没有颜色的。
2. avoid
v.避免，逃避 *a(=off)
avoidable adj.可以避免的
3. avoidance
n.回避 *a(=off)
the avoidance of had companions 回避不好的朋友
avoidance of taxation 避税
adj.空的；空闲的；（~of）没有的，缺乏的；[律]无效的 n.空间；空虚感；空地 v.使无效
viod hours 空闲时间
subject void of interest 乏味的主题
null and void 无效的