French word pendule comes from Latin pendulus, Latin funis (Rope, cord, line.)

Detailed word origin of pendule

Dictionary entry	Language	Definition
pendulus	Latin (lat)	Doubtful, uncertain, hesitating. Hanging, hanging down, pendent, suspended.
funis	Latin (lat)	Rope, cord, line.
funependulus	Latin (lat)
funependule	Middle French (frm)
pendule	French (fra)	Pendulum. Pendulum clock.

Words with the same origin as pendule