於事無補

于事无补
yúshìwúbǔ
  1. unhelpful
  2. useless

CEDICT

unhelpful or useless to the situation

Wiktionary

對於事情，沒有任何幫助。

重編國語辭典

Entry Composition

1 於 yú
  1. (of time or place) in; at; on
  2. (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for
  3. (indicating a source) from; out of
  4. (used in comparison) than
  5. (used in the passive voice) by
2 事 shì
  1. matter
  2. thing
  3. item
  4. work
  5. affair

classifiers: 件, 樁, 回
3 無補 wúbǔ
  1. of no avail
  2. not helping in the least

Related entries

不當事 bùdāngshì
  1. useless
  2. regard as useless
不稂不莠 bùlángbùyǒu
  1. useless
  2. worthless
  3. good-for-nothing
沒用 méiyòng useless
没用的！

That won't work!

Source: Tatoeba

沒起子 méiqǐzi
  1. (dialect) (of a person) useless
  2. pathetic
  3. spineless
無用 wúyòng
  1. useless
  2. worthless
省略掉无用的词！

Omit needless words!

Source: Tatoeba

爛泥扶不上牆 lànnífúbùshàngqiáng
  1. useless (idiom)
  2. worthless
  3. inept
吃乾飯 chīgānfàn
  1. (coll.) to be incompetent
  2. useless
  3. good-for-nothing
寙 yǔ
  1. bad
  2. useless
  3. weak
窳 yǔ
  1. bad
  2. useless
  3. weak
不中用 bùzhōngyòng
  1. unfit for anything
  2. no good
  3. useless
  4. (of a sick person) beyond hope
形同虛設 xíngtóngxūshè
  1. to exist in name only
  2. empty shell
  3. useless (idiom)
疣贅 yóuzhuì
  1. wart
  2. superfluous
  3. useless
肉瘤 ròuliú
  1. wart
  2. sarcoma
  3. superfluous
  4. useless