Word: kingpin
Part of speech: Noun
Syllables: king
pin
Definition: The pivot or connector between a tractor and trailer in the fifth-wheel coupling of semi-trailer truck.
Morphemes:
Affix: king
Language: en
PoS: Verb
Meaning: To promote a piece of draughts/checkers that has traversed the board to the opposite side, that piece subsequently being permitted to move backwards as well as forwards.
Affix: pin
Language: en
PoS: Noun
Meaning: Any of the individual connecting elements of a multipole electrical connector.