unstableadj.
英 ʌn'steɪb(ə)l | 美 ʌn'stebl
中文adj. 不稳定的；动荡的；易变的
词根词源
unstable (adj.)early 13c., "apt to move," from un- (1) "not" + stable (adj.). Similar formation in Middle High German unstabel. Meaning "liable to fall" is recorded from c. 1300; sense of "fickle" is attested from late 13c. An Old English word for this was feallendlic, which might have become *fally.
关键词