必不可少

• Pinyin: bì bù kě shǎo
• Hanzi breakdown: 必 = 心 with a stroke (must); 不 = not; 可 = able; 少 = few/lack

Meaning

Indispensable; essential; absolutely necessary.

Describes something that cannot be done without — a crucial component, requirement, or element. Emphasizes that removing this thing would make the whole incomplete or impossible. More emphatic than 必要.

Examples

1. 团队合作是完成这个项目必不可少的条件。 Teamwork is essential for completing this project.
2. 睡眠对健康来说是必不可少的，千万别熬夜。 Sleep is indispensable for health — definitely don't stay up late.
3. 在这道菜里，花椒是必不可少的调料。 In this dish, Sichuan peppercorn is an essential seasoning.

Usage Guide

Context: requirements, emphasis, necessity

Tone: emphatic

Do Say

• 水是生命必不可少的。(Water is essential for life.)
• 这是必不可少的步骤。(This is an indispensable step.)

Don't Say

• 用'必不可少'形容可有可无的东西 (Don't use 必不可少 for optional things — it means absolutely essential)

Origin & History

必 (must) + 不可 (cannot) + 少 (lack). Must not be lacking.

Cultural Context

Generation: All ages

Social background: Universal