必定

• Pinyin: bì dìng
• Hanzi breakdown: 必 = 心 with a stroke (must); 定 = 宀 (roof) + 正 (correct)

Meaning

Certainly; surely; bound to; definitely will.

An adverb expressing strong certainty about something that will happen or is true. More formal and emphatic than 一定. Often used in predictions, promises, or logical conclusions.

Examples

1. 以他的能力，这次面试必定能通过。 With his abilities, he'll definitely pass this interview.
2. 春天来了，万物复苏，花必定会开。 Spring has come, everything is reviving — the flowers will surely bloom.
3. 违法乱纪的人必定会受到法律的制裁。 Those who break the law will certainly face legal consequences.

Usage Guide

Context: predictions, assurance, logical conclusions

Tone: confident

Do Say

• 他必定会成功的。(He will definitely succeed.)
• 事实必定会证明一切。(The facts will surely prove everything.)

Don't Say

• 用'必定'表示不确定的事 (Don't use 必定 for uncertain things — it implies strong conviction)

Origin & History

必 (must/certainly) + 定 (fixed/determined). Certainly determined.

Cultural Context

Generation: All ages

Social background: Universal