Definitions for "Cavil"
To raise captious and frivolous objections; to find fault without good reason.
A captious or frivolous objection.
an evasion of the point of an argument by raising irrelevant distinctions or objections
Keywords:  mason, hammer, rough, stone, flat
Mason's hammer that is used for rough finishing stone, with a pointed head on one side and a flat side.
To cavil at.