plug away

Thesaurus

Verb	1.	plug away - work doggedly or persistently; "She keeps plugging away at her dissertation" keep one's nose to the grindstone, keep one's shoulder to the wheel, peg away, slog work - exert oneself by doing mental or physical work for a purpose or out of necessity; "I will work hard to improve my grades"; "she worked hard for better living conditions for the poor"
	2.	plug away - persist in working hard; "Students must plug away at this problem" plug hang in, persevere, persist, hang on, hold on - be persistent, refuse to stop; "he persisted to call me every night"; "The child persisted and kept asking questions"