also: なんよりも
more than anything; above all else
Used to emphasize that something is the most important or the highest priority. Often placed at the beginning of a sentence or before the main verb.
Health is more important than anything.
Above all else, the safety of my family comes first.
Combination of 何 (what) + より (than) + も (also/even), literally 'even more than what', used adverbially to mean 'more than anything'.