一定要

yīdìngyào
must

CEDICT

Examples

一定要有苹果。

Apples are necessary.

Source: Tatoeba

你一定要帮帮她。

It is necessary for you to help her.

Source: Tatoeba

我一定要马上去吗？

Must I go there at once?

Source: Tatoeba

你一定要好好记住。

You must bear it in mind.

Source: Tatoeba

你们全部一定要读。

All of you have to read it.

Source: Tatoeba

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Entry Composition

1 一定 yīdìng
  1. surely
  2. certainly
  3. necessarily
  4. fixed
  5. a certain (extent etc)
  6. given
  7. particular
  8. must
2 要 yào
  1. to want; to need; to ask for
  2. will; shall; about to
  3. need to; should
  4. if (same as 要是 yàoshi)
  5. (bound form) important

Related entries

务必 wùbì
  1. must
  2. to need to
  3. to be sure to
務必在三點鐘來。

Be sure to come at 3.

Source: Tatoeba

合当 hédāng
  1. must
  2. should
他不适合当老师。

He is unfit to be a teacher.

Source: Tatoeba

必得 bìděi
  1. must
  2. have to
他们坚持认为日常锻练是必得表出的行为。

They insist that daily exercise is an action that must be done.

Source: Tatoeba

总得 zǒngděi
  1. must
  2. have to
  3. be bound to
總得有過河的辦法。

There must be some way of traversing the river.

Source: Tatoeba

非得 fēiděi (followed by a verb phrase, then – optionally – 不可, or 不行 etc) must
你不必什麼都非得自己來。

You shouldn't try to do everything by yourself.

Source: Tatoeba

须 xū
  1. must
  2. to have to
  3. to wait
交友须谨慎。

You must be careful in choosing your friends.

Source: Tatoeba

得 děi
  1. to have to
  2. must
  3. ought to
  4. to need to
跑得飛快

Run like the wind.

Run very fast.

Source: Tatoeba

得要 děiyào
  1. to need
  2. must
我忙得要死。

I'm terribly busy.

Source: Tatoeba

必 bì
  1. certainly
  2. must
  3. will
  4. necessarily
有起必有落。

What goes up must come down.

Source: Tatoeba

必须 bìxū
  1. to have to
  2. must
  3. compulsory
  4. necessarily
必须的！

Definitely!

Source: Tatoeba

说不得 shuōbude
  1. to be unmentionable
  2. be unspeakable
  3. must
  4. cannot but
应 yīng
  1. to agree (to do sth)
  2. should
  3. ought to
  4. must
  5. (legal) shall
我应放更多盐。

I should've added more salt.

Source: Tatoeba

不得已 bùdéyǐ
  1. to act against one's will
  2. to have no alternative but to
  3. to have to
  4. to have no choice
  5. must
这不是我们的错……大家都是逼不得已才这么做。

It wasn't our fault... We all had to do it.

Source: Tatoeba

一定 yīdìng
  1. surely
  2. certainly
  3. necessarily
  4. fixed
  5. a certain (extent etc)
  6. given
  7. particular
  8. must
這一定是我。

It has to be me.

Source: Tatoeba