诚然

誠然
chéngrán
  1. indeed
  2. true! (I agree with you)

CEDICT

  1. (literary) no doubt; it is true; to be sure
  2. (literary) truly; really
  3. no doubt; it is true; to be sure
  4. truly; really

Wiktionary

确实如此。《西游记．第一四回》：「刘太保诚然胆大，走上前来，与他拔去了鬓边草、颔下莎。」《老残游记．第六八回》：「摇串铃诚然无济于世道，难道做官就有济于世吗？」也作「果然」、「信然」。

重編國語辭典

Entry Composition

1 诚 chéng
  1. (bound form) sincere; authentic
  2. (literary) really; truly
2 然 rán
  1. correct
  2. right
  3. so
  4. thus
  5. like this
  6. -ly

Related entries

信然 xìnrán
  1. indeed
  2. really
委实 wěishí
  1. indeed
  2. really (very much so)
确实 quèshí
  1. indeed
  2. really
  3. reliable
  4. real
  5. true
湯姆確實貪。

Tom certainly is greedy.

Source: Tatoeba

可是 kěshì
  1. but; however
  2. (used for emphasis) indeed
可是太贵了！

But it's too expensive!

Source: Tatoeba

的确 díquè
  1. really
  2. indeed
她的確是正確的。

She's correct for sure.

Source: Tatoeba

确乎 quèhū
  1. really
  2. indeed
着实 zhuóshí
  1. truly
  2. indeed
  3. severely
  4. harshly
着然 zhuórán
  1. really
  2. indeed
实在 shízài
  1. really
  2. actually
  3. indeed
  4. true
  5. real
  6. honest
  7. dependable
  8. (philosophy) reality
这实在不合适。

It is highly improper.

Source: Tatoeba

敢情 gǎnqing
  1. actually
  2. as it turns out
  3. indeed
  4. of course
真 zhēn
  1. really
  2. truly
  3. indeed
  4. real
  5. true
  6. genuine
真晚！

So late!

Source: Tatoeba

那是 nàshi
  1. (coll.) of course
  2. naturally
  3. indeed
那是谁？

Who is that?

Source: Tatoeba

果 guǒ
  1. fruit
  2. result
  3. resolute
  4. indeed
  5. if really
你喜歡吃水果嗎？

Do you like to eat fruit?

Source: Tatoeba

竟 jìng
  1. unexpectedly
  2. actually
  3. to go so far as to
  4. indeed
你的演說十分精彩，但竟沒人懂得欣賞。

Your wonderful lecture was pearls before swine.

Source: Tatoeba

固 gù
  1. hard
  2. strong
  3. solid
  4. sure
  5. assuredly
  6. undoubtedly
  7. of course
  8. indeed
  9. admittedly
真格 zhēngé
  1. true
  2. real
确有其事 quèyǒuqíshì
  1. (confirm to be) true
  2. authentic
实 shí
  1. real
  2. true
  3. honest
  4. really
  5. solid
  6. fruit
  7. seed
  8. definitely
報告和事實不相符。

This account does not agree with the facts.

Source: Tatoeba

属实 shǔshí
  1. to turn out to be true
  2. verified
  3. true
你確定你的資料屬實嗎？

Are you sure of your facts?

Source: Tatoeba

正儿八经 zhèngérbājīng
  1. serious
  2. earnest
  3. real
  4. true
确 què
  1. authenticated
  2. solid
  3. firm
  4. real
  5. true
懂了就正确做。

If you understand, then do it properly.

Source: Tatoeba