埋头苦干

埋頭苦幹
máitóukǔgàn
  1. to bury oneself in work (idiom); to be engrossed in work
  2. to make an all-out effort
  3. up to the neck in work

CEDICT

bury oneself in work

Wiktionary

做事心力专一，勤勉踏实。

重編國語辭典

Entry Composition

1 埋头 máitóu
  1. to immerse oneself in
  2. engrossed in sth
  3. to lower the head (e.g. to avoid rain)
  4. countersunk (of screws, rivets etc)
2 苦干 kǔgàn to work hard

Related entries

全力以赴 quánlìyǐfù
  1. to do at all costs
  2. to make an all-out effort
我们全力以赴来完成工作。

We went all out to get the job done.

Source: Tatoeba