beg to differ
Disagree with someone, as in John told me Max was sure to win, but I beg to differ—I don't think he has a chance. This courteous formula for expressing disagreement echoes similar uses of beg in the sense of “ask,” such as I beg your pardon, so used since about 1600. Also see excuse me.
Words nearby beg to differ
befriend,
befuddle,
beg,
beg off,
beg the question,
beg to differ,
beg, borrow, or steal,
beg-pardon,
beg.,
begad,
began