logical / rational / reasonable / science

work done for free, unpaid work, uncompensated work / work done in vain, work with no favorable end result

to work for free, to work without pay or other compensation / to work in vain, to work with no favorable end result

(archaic, grammar) any word that declines or conjugates / (archaic, grammar) more specifically, a verb

bring (something to a person/place)

(archaic) bring (something to a person/place)

a toy, plaything

(idiomatic) support, take someone's side, stand by someone

carry, take, bring (something)

(idiomatic) just right, most suitable / bring me...