"haughty, dictatorial," 1732, figurative present-participle adjective from overbear (v.) in its modern sense "to repress by force, overpower." Earlier the word was used in a literal sense (1670s), but this seems to be obsolete. In Middle English it was a verbal noun, "act of transferring or transporting" (early 15c.).
insufferably overbearing behavior toward the waiter
overalls
overanxious
overarching
overawe
overbear
overbearing
overbite
overblown
overboard
overbook
overburden