Word: onboard
Part of speech: Adverb
Syllables: on
board
Definition: On or in a vehicle or vessel; aboard; on board.
Morphemes:
Affix: on-
Language: en
PoS: Prefix
Meaning: on, at, toward, upon.
Affix: board
Language: en
PoS: Verb
Meaning: To cover with boards or boarding.