arbitrary
英 ['ɑːbɪt(rə)rɪ]
美['ɑrbətrɛri]
	    - adj. [数] 任意的;武断的;专制的
 
英英释意
- 1. based on or subject to individual discretion or preference or sometimes impulse or caprice;
 - "an arbitrary decision"
 - "the arbitrary rule of a dictator"
 - "an arbitrary penalty"
 - "of arbitrary size and shape"
 - "an arbitrary choice"
 - "arbitrary division of the group into halves"