labour

nouns

a social class comprising those who do manual labor or work for wages
"there is a shortage of skilled labor in this field"
concluding state of pregnancy; from the onset of contractions to the birth of a child
"she was in labor for six hours"
productive work (especially physical work done for wages)
"his labor did not require a great deal of skill"

verbs

work hard
"She was digging away at her math homework"; "Lexicographers drudge all day long"
is derived from
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"
undergo the efforts of childbirth