amen
Concise Oxford English Dictionary © 2008 Oxford University Press:
amen /ɑːˈmɛn, eɪ-/
▶exclamation said at the end of a prayer or hymn, meaning ‘so be it’.
– origin OE, from eccles. L., from Gk amēn, from Heb. 'āmēn ‘truth, certainty’.
'amen' also found in these Oxford entries:

