Hammer out phrasal verb
A noun or pronoun can be used between "hammer" and "out"
To hit something repeatedly in order to make a dent disappear or stretch it out and make it thinner
I tried to hammer out the dent on the tailgate, but I couldn't.
They need to heat up the metal piece before hammering it out.
To reach a decison or agreement after lengthy discussion
Two warring countries are still trying to hammer a truce out.
Governments have hammered out an international treaty on climate change.
To play something on the piano
He sat in the corner, hammering out a song written by him.
I've been hooked on piano lately. I wish I could soon hammer out a song.
The verb "hammer" must be conjugated according to its tense.
Someone who is totally bad at doing something.
Mary really can't sing for toffee.