失策

shīcè
  1. to blunder
  2. to miscalculate
  3. miscalculation
  4. unwise (move)

CEDICT

to make a blunder, to slip up; to miscalculate; to be unwise in a move

Wiktionary

計謀失誤。《後漢書．卷四四．胡廣傳》：「是以慮無失策，舉無過事。」《文選．陸機．辯亡論上》：「謀無遺諝，舉不失策。」也作「失算」。

重編國語辭典

Entry Composition

1 失 shī
  1. to lose
  2. to miss
  3. to fail
=2 策 cè
  1. policy
  2. plan
  3. scheme
  4. bamboo slip for writing (old)
  5. to whip (a horse)
  6. to encourage
  7. riding crop with sharp spines (old)
  8. essay written for the imperial examinations (old)
  9. upward horizontal stroke in calligraphy
=2 策 cè variant of 策 cè
=2 策 cè variant of 策 cè

Related entries

搞錯 gǎocuò
  1. mistake
  2. to make a mistake
  3. to blunder
  4. mistaken
我搞错了。

I was wrong.

Source: Tatoeba

弄錯 nòngcuò
  1. to err
  2. to get sth wrong
  3. to miscalculate
  4. to misunderstand
失手 shīshǒu
  1. a slip
  2. miscalculation
  3. unwise move
  4. accidentally
  5. by mistake
  6. to lose control
  7. to be defeated
不智 bùzhì unwise