Word: onset
Part of speech: Noun
Syllables: on
set
Definition: Anything added, such as an ornament or as a useful appendage.
Morphemes:
Affix: on-
Language: en
PoS: Prefix
Meaning: on, at, toward, upon.
Affix: set
Language: en
PoS: Verb
Meaning: To attach or affix (something) to something else, or in or upon a certain place.