于事无补

於事無補
yúshìwúbǔ
  1. unhelpful
  2. useless

CEDICT

unhelpful or useless to the situation

Wiktionary

对于事情，没有任何帮助。

重編國語辭典

Entry Composition

=1 于 yú
  1. to go
  2. to take
  3. sentence-final interrogative particle
  4. variant of 于 yú
=1 于 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 无补 wúbǔ
  1. of no avail
  2. not helping in the least

Related entries

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

That won't work!

Source: Tatoeba

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

Omit needless words!

Source: Tatoeba

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