Meaning of “slog” - Learner’s Dictionary

slog

verb us uk /slɒɡ/ present participle slogging, past tense and past participle slogged informal
slog up/down/through, etc

to move forward with difficulty:

We slogged up the hill in silence.

See also

(Definition of “slog verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)