unoptional

形容词 adj.

英文释义

形容词 adj.
  1. Not optional. not-comparable
    — Each and every one of the branches mentioned is presented for the pupil's study or exercise as an unoptional subject, essential to his proper training and development in his early school career.

词源

From un- + optional.
0 次浏览 数据来源: Wiktionary