once and for all
Conclusively, finally, permanently.
They replaced the entire door, in hopes of correcting the sticking and squeaking once and for all.
ADJ.
better, handsome, most, occupied
He was once the most handsome man in the entire town.
VERB + ONCE
begin, cut, go, leave, move, set, start
Once we set off on our road trip, we didn't stop driving until we reached the coast.
ONCE + NOUN
life, motorbicycle, pizza
He crashed his motorbike only once in his entire life, but he never rode it again.
PREP.
in, in, off, on
I finally got my driving license once and for all after failing the test three times.
ADV.
especially, only
She only once remembered to bring her umbrella to work during the rainy season.