失當

失当
shīdàng
  1. inappropriate
  2. improper

CEDICT

improper, inappropriate

Wiktionary

不妥當、不適宜。

重編國語辭典

不適宜，不妥當

維基詞典

Entry Composition

1 失 shī
  1. to lose
  2. to miss
  3. to fail
2 當 dàng
  1. at or in the very same...
  2. suitable
  3. adequate
  4. fitting
  5. proper
  6. to replace
  7. to regard as
  8. to think
  9. to pawn
  10. (coll.) to fail (a student)

Related entries

失宜 shīyí
  1. inappropriate
  2. improper
沒分寸 méifēncùn
  1. inappropriate
  2. bad-mannered
不便 bùbiàn
  1. inconvenient
  2. inappropriate
  3. unsuitable
  4. short of cash
我们对这次的延迟表示抱歉，并对可能造成的不便表示遗憾。

We apologize for the delay and regret any inconvenience it may have caused.

Source: Tatoeba

不倫不類 bùlúnbùlèi
  1. out of place
  2. inappropriate
  3. incongruous
不妥 bùtuǒ
  1. not proper
  2. inappropriate
恐怕这里提法不妥当。

I'm afraid this is an incorrect formulation of the question.

Source: Tatoeba

欠妥 qiàntuǒ
  1. improper
  2. inappropriate
  3. unsatisfactory
  4. inadequate
不宜 bùyí
  1. not suitable
  2. inadvisable
  3. inappropriate
不倫 bùlún
  1. (of a relationship) improper (adulterous, incestuous, teacher-student etc)
  2. unseemly
不端 bùduān
  1. improper
  2. dishonorable
媮 tōu
  1. improper
  2. irregular
非份 fēifèn
  1. improper
  2. presumptuous
  3. assuming
  4. overstepping one's bounds
  5. also written 非分 fēifèn
非分 fēifèn
  1. improper
  2. presumptuous
  3. assuming
  4. overstepping one's bounds
  5. also written 非份 fēifèn
不正當 bùzhèngdàng
  1. dishonest
  2. unfair
  3. improper
偏斜 piānxié
  1. crooked
  2. not upright
  3. diverging from straight line
  4. improper
  5. dishonest
苟且 gǒuqiě
  1. perfunctory
  2. careless
  3. drifting along
  4. resigned to one's fate
  5. improper (relations)
  6. illicit (sex)