back

n.背，背部；背面，反面；后面，后部；（椅子等的）靠背

vt.使后退；支持；加背书于；下赌注于

vi.后退；倒退

adj.背部的；后面的；以前的；拖欠的

adv.以前；向后地

网络解释.回；背；回来；返回

词形变化:

复数：backs 复数：backed 复数：backed 复数：backing 复数：backs

at someone's back 1 . 追求；支持（某人） back and forth 2 . 来回地 back in the day 3 . 在过去，在以前 someone's back is turned 4 . 某人的注意力在别处 the back of beyond 5 . 偏僻处 back o'Bourke 6 . (澳，非正式)内地 the back of one's mind 7 . 下意识里 back to front 8 . (英)前后颠倒 back water 9 . 倒桨 back the wrong horse 10 . 下错了赌注；做错了选择 behind someone's back 11 . 在某人背后，背着某人 get (或 put) someone's back up 12 . 惹恼（或惹怒）某人 in back 13 . (北美)在后面（尤指建筑） know something like the back of one's hand 14 . （对地方或路线）了如指掌 on one's back 15 . 卧床疗养 put one's back into 16 . 竭尽全力于 turn one's back on 17 . 对…掉头不管；轻视 with one's back to (或 up against) the wall 18 . 走投无路；处于绝境 back something up 19 . (计算机)备份 back away 20 . 撤退：从某个位置撤离；撤退 back down 21 . 让步，放弃：从某个位置、观点或义务中撤出 back off 22 . 撤回或离开 back out 23 . 中途退出：在完成之前从（某项计划或事业）中退出 back up 24 . 使聚集：引起堆积或经过积累 习惯用语 back and fill 1 . 【航海】调整航向：在狭窄的水道中操纵船，通过调整风帆以便使风帆间进出的风向有所改变

v.1.支持;鼓励;赞助释义下的同义词

behind encourage sponsor bat go to boost support succour abet for stand favour promote help patronize countenance subsidize main

2.支撑,支持,证实释义下的同义词

sustain certify bolster validate attest corroborate uphold substantiate second confirm

3.返回,翻转,倒退释义下的同义词

recede down rebound recoil ebb return tail retrogress go retrocede back turn backwards reverse regress retreat backtrack revert