"labouring" 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"
2. tug, labor, labour, push, drive
strive and make an effort to reach a goal
"She tugged for years to make a decent living"
"We have to push a little to make the deadline!"
"She is driving away at her doctoral thesis"
3. labor, labour
undergo the efforts of childbirth
"labouring" 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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