Gap filled: 'refudiate', 'dupper'

From online source:

"Refute means 'to disprove' and repudiate means 'to reject, disassociate oneself from'. Not exactly a subtle difference." Cfr. dupper. (dinner and supper).

"In many dialects, 'dinner' is the largest meal of the day; not necessarily the evening meal. 'Dupper' would have the advantage of explicitly referring to a large evening meal."