Where does “amen” come from?

amen (Old Portuguese) comes from Latin amen, from Ancient Greek ἀμήν, from Hebrew אמן — Used to express agreement with what was just...

Ancestry of “amen”, step by step

Step	Language	Word	Meaning
1	Latin	amen	amen; so be it, let it be; amen; truly, verily;...
2	Ancient Greek	ἀμήν	truly, certainly; so be it
3	Hebrew	אמן	Used to express agreement with what was just...

amen — Etymology, Origin & Word History | Etymology Explorer