"toiling" in the verb sense
1. labor, labour, toil, fag, travail, grind, drudge, dig, moil
"She was digging away at her math homework"
"Lexicographers drudge all day long"
"toiling" in the adjective sense
1. drudging, laboring, labouring, toiling
doing arduous or unpleasant work
"the bent backs of laboring slaves picking cotton"
"toiling coal miners in the black deeps"
Source: WordNet® (An amazing lexical database of English)
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