indispensable

/ˌɪndɪˈspensəb(ə)l/📚 9137 1四级六级考研托福雅思
If you say that someone or something is indispensable, you mean that they are absolutely essential and other people or things cannot function without them. 必不可少的

adjective [原级]不可或缺的,必需的;不能撇开的,责无旁贷的

She was becoming indispensable to him.
对他来说她正变得不可或缺。

noun [专属名词]不可缺少之物,必不可少的人

She made herself indispensable to the department.
她成为这个部门不可缺少的一分子。

indispensable

-able ⌜ 能够...的 - capable of being ~ ⌟
in(不) + dispensable(可有可无的) → 不是可有可无的 → 必不可少的
单词造句:
网友用“Indispensable”造句精选
Cars have become an indispensable part of our lives. 汽车已成了我们生活中必不可少的一部分。