Where does “legmentőbb” come from?

legmentőbb (Hungarian) comes from Hungarian mentőbb, from Hungarian mentő, from Hungarian ment, from Hungarian mén, from Hungarian megy, from Proto-Uralic mene- — to go.

Ancestry of “legmentőbb”, step by step

Step	Language	Word	Meaning
1	Hungarian	mentőbb	—
2	Hungarian	mentő	present participle of ment; rescuing; ambulance
3	Hungarian	ment	to rescue, to save; third-person singular past of...
4	Hungarian	mén	stallion; archaic third-person singular...
5	Hungarian	megy	to go
6	Proto-Uralic	mene-	to go

Every word from Proto-Uralic mene- →Every word from Hungarian megy →Every word from Hungarian mén →