twain
number/tweɪn/
/tweɪn/
(old use)Idioms - two
二 Word OriginOld English twegen, masculine of twā, of Germanic origin.
Idioms
never the twain shall meet
- (saying) used to say that two things are so different that they cannot exist together
二者永远合不到一起；泾渭分明；大相径庭