grandfather
noun
°The father of someone’s parent:.
°(by extension) a male forefather.
verb
°To retain existing laws or rules only for those people or organisations that were previously affected by them, and apply new laws or rules to the unaffected people or organisations.
synonyms: granddad, grandad, grandaddy, grandsire more» , grandpa, granpa, grandpappy, granpappy, gramps, pops