嘥saai1氣hei3

English

1. (phrasal verb) to do things in vain; to waste someone's efforts for nothing
2. to waste one's breath; to give advice about something without positive results
3. to waste one's efforts; to spend effort in vain

粵語 — Cantonese

1. 講完都冇用，浪費咗講嘅嘢
2. 做嚟都冇用，浪費心力，徒勞無功

Examples

• 同你講嚟都嘥氣！

  Talking to you is a waste of breath! ----

• 同佢拗嚟都嘥氣。

  It's no use arguing with him.

  Tatoeba · nickyeow CC BY

• 反正都唔識，做嚟都嘥氣。

  I don't understand the materials anyway, it would be a waste of effort to attempt it.

• 講得咁清楚佢都唔明，真係嘥氣！

  I explained it so carefully and still didn't understand. What a waste of breath!