必要 (bì yào) means “necessary” | MotiTan Chinese Dictionary

More examples

现在没有必要浪费时间。xiàn zài méi yǒu bì yào làng fèi shí jiān

There is no need to waste time now.

A support without which an intended result cannot stand.

重要zhòng yào: Deserving special attention because of its effect on what happens or what is decided.

表示为完成某事所必须具备或发生的条件，对实现目标不可缺少。biǎo shì wèi wán chéng mǒu shì suǒ bì xū jù bèi huò fā shēng de tiáo jiàn duì shí xiàn mù biāo bù kě quē shǎo

必要 (bìyào, "necessary") combines 必 (bì, "certainly") with 要 (yào, "be needed"), so its parts point to a requirement that must be present.

English speakers may expect this meaning mainly in formal statements, but Chinese uses it freely in everyday decisions about whether an action is required.