Word: unhappen
Part of speech: Verb
Syllables: un
hap
pen
Definition: To cease to have happened; to undo itself.
Morphemes:
Affix: un-
Language: en
PoS: Prefix
Meaning: deprive of, release from, free from, remove from, extract from
Affix: hap
Language: en
Meaning: a chance, occurrence, byfall
Affix: -en
Language: en
Meaning: inchoative