誠然

诚然
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

確實如此。《西遊記．第一四回》：「劉太保誠然膽大，走上前來，與他拔去了鬢邊草、頷下莎。」《老殘遊記．第六八回》：「搖串鈴誠然無濟於世道，難道做官就有濟於世嗎？」也作「果然」、「信然」。

重編國語辭典

Entry Composition

1 誠 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
委實 wěishí
  1. indeed
  2. really (very much so)
確實 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

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

She's correct for sure.

Source: Tatoeba

確乎 quèhū
  1. really
  2. indeed
著實 zhuóshí
  1. truly
  2. indeed
  3. severely
  4. harshly
著然 zhuórán
  1. really
  2. indeed
實在 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
確有其事 quèyǒuqíshì
  1. (confirm to be) true
  2. authentic
實 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

屬實 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

正兒八經 zhèngérbājīng
  1. serious
  2. earnest
  3. real
  4. true
確 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