Word: onboard
Part of speech: Adjective
Syllables: on
board
Definition: Being a part of, being included in, participating in
Morphemes:
Affix: on-
Language: en
PoS: Prefix
Meaning: on, at, toward, upon.
Affix: board
Language: en
PoS: Verb
Meaning: To approach (someone); to make advances to, accost.