keep one's nose to the grindstone

Từ điển Oxford Learners Wordfinder Dictionary

verb

work doggedly or persistently
- She keeps plugging away at her dissertation
• Syn:
plug away, peg away, slog, keep one's shoulder to the wheel
• Derivationally related forms:
slogger (for: slog)
• Hypernyms:
work
• Verb Frames:
- Somebody ----s
- Somebody ----s PP