groom

a man participant in his own marriage ceremony

someone employed in a stable to take care of the horses

a man who has recently been married

educate for a future role or function; "He is grooming his son to become his successor"; "The prince was prepared to become King one day"; "They trained him to be a warrior"

give a neat appearance to; "groom the dogs"; "dress the horses"

care for one's external appearance; "He is always well-groomed"