save one's strength Antonyms

apply toil wade wading bear down drive home bend over backwards thrash about slogging take pains wrick overuse knuckle down donkeywork mug up work like a mule overextend swink strive consecrate cranch dedicate labor overburden overexert overexertion overlabor overloading overstrain overtask overwork parturiency plowing ploughing slaving spadework