想必

xiǎngbì
  1. presumably
  2. probably
  3. in all likelihood
  4. surely

CEDICT

presumably; most probably; in all likelihood; surely

Wiktionary

以己意推测而知必然如此。

重編國語辭典

Entry Composition

1 想 xiǎng
  1. to think (about)
  2. to think of; to devise
  3. to think (that); to believe (that)
  4. to desire; to want (to)
  5. to miss (feel wistful about the absence of)
2 必 bì
  1. certainly
  2. must
  3. will
  4. necessarily

Related entries

横是 héngshi
  1. probably
  2. most likely
莫不是 mòbùshì
  1. probably
  2. perhaps
  3. could it be that...?
大概 dàgài
  1. roughly
  2. probably
  3. rough
  4. approximate
  5. about
  6. general idea
我大概懂了。

I sort of understand.

Source: Tatoeba

大约 dàyuē
  1. approximately
  2. probably
大約吧。

Approximately.

Source: Tatoeba

依稀 yīxī
  1. vaguely
  2. dimly
  3. probably
  4. very likely
我依稀記得見過他。

I vaguely remember meeting him.

Source: Tatoeba

容或 rónghuò
  1. perhaps
  2. maybe
  3. probably
该 gāi
  1. should
  2. ought to
  3. probably
  4. must be
  5. to deserve
  6. to owe
  7. to be sb's turn to do sth
  8. that
  9. the above-mentioned
該走了。

It's time to go.

Source: Tatoeba

光景 guāngjǐng
  1. circumstances
  2. scene
  3. about
  4. probably
令人震惊的光景让了他吓得发抖。

The terrible scene made him tremble in fear.

Source: Tatoeba

大半 dàbàn
  1. more than half
  2. greater part
  3. most
  4. probably
  5. most likely
我已经活了大半辈子了。

I've already lived most of my life.

Source: Tatoeba

有可能 yǒukěnéng
  1. possible
  2. probable
  3. possibly
  4. probably
  5. may
  6. might
有可能吗？

Would that be possible?

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

总 zǒng
  1. (bound form) general; overall
  2. to sum up
  3. in every case; always; invariably
  4. anyway; after all; eventually; sooner or later
  5. surely
  6. (after a person's name) abbr. for 总经理 zǒngjīnglǐ or 总编 zǒngbiān etc
我总觉得渴。

I'm always thirsty.

Source: Tatoeba