Word: happenest
Part of speech: Verb
Syllables: ha
ppe
nest
Definition: Alternative form of happen; happen, occur, or be the case in the course of events or by chance;  (Santayana)
Morphemes:
Affix: hap
Language: en
Meaning: a chance, occurrence, byfall
Affix: -en
Language: en
Meaning: inchoative
Affix: -est
Language: en
PoS: Suffix
Meaning: Used to form the second-person singular present tense and past tense of verbs. (if thou is the subject; not used with you)