necessary
形容词比较级：more necessary
形容词最高级：most necessary
名词复数：necessaries
词形变化：
同义词：
essential | needed | required | obligatory | compulsory | indispensable | important | exigent | compelling | urgent | imperative | basic | vital | necessity | imperious | pressing | desired | significant | crucial | de rigueur | necessitous | mandatory | requisite | requirement |
反义词：
词义辨析：
同义:
a.必要的, 必需的
required
compulsory
urgent
important
obligatory
compelling
needed
essential
exigent
imperative
同义参见:
vital
indispensable
imperious
significant
basic
pressing
necessity
desired
反义:
a.必要的, 必需的
unnecessary
needless