Italian planare

← English planar (borrowed)

← French planer (derived)

← French plain (mention)

← Proto-Indo-European *pleh₂- (root)

← Proto-Indo-European *pleh₂- (mention)

← Proto-Indo-European *pleh₂- (root)

← Latin plānus (derived)

← Latin plānum (derived)

← Latin plānus (derived)

→ Italian planarità (suffix)

→ Italian planamento (suffix)