Meaning of “plug away” in the English Dictionary

american-english dictionary

"plug away" in American English

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plug away

phrasal verb with plug us /plʌɡ/ verb -gg-

to keep working hard in a determined way, esp. at something that you find difficult:

She’s been plugging away at that novel for years.

(Definition of “plug away” from the Cambridge Academic Content Dictionary © Cambridge University Press)