efficient in Wingdings is ♏︎♐︎♐︎♓︎♍︎♓︎♏︎■︎⧫︎

Causing effects; producing results; that makes the effect to bewhat it is; actively operative; not inactive, slack, or incapable;characterized by energetic and useful activity; as, an efficientofficer, power.The efficient cause is the working cause. Wilson.