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

计谋失误。《后汉书．卷四四．胡广传》：「是以虑无失策，举无过事。」《文选．陆机．辩亡论上》：「谋无遗諝，举不失策。」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

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

I was wrong.

Source: Tatoeba

弄错 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