"hacer flaquear" in English

to do- to be up to- to acquire- to act- to bore- to brew- to brew- to build- to carry out- to cast- to chip- to churn- to clean up- to clock- to clock up- to cook- to cut- to deliver- to dispense- to drill- to effect- to effect- to get- to get in- to get up to- to go- to gouge- to hold- to interject- to introduce- to knit- to knock up- to lay- to lay- to make out- to make up- to pass- to perform- to perk- to pitch- to put forward- to put in- to put together- to raise- to run up- to serve- to sew- to stage- to swim- to take- to take- to take- to take- to throw- to throw in- to throw out- to tie- to tool- to turn- to utter- to whistle up- to work- to work out- to write out- to add up- to perform- to score- to pick up- to make- to ask- to draw up- to voice- to bake- to draw- to draw up- to manufacture- to pack- to write

to droop- to falter- to flag- to sag- to waver- to give way- to weaken