irrepetible
unrepeatable
ir-
not (prefix)
+
repeat
repeat
+
-ible
able to be (adjective suffix)
Irrepetible means unrepeatable and can be broken down into ir-0 (not0) + repeat1 + -ible2 (able to be2), literally meaning 'not able to be repeated'.
adjective
- unrepeatableUnable to be repeated or reproducedFue un momento irrepetible en la historia. // It was an unrepeatable moment in history.