قَفَخَهُ, (Ṣ, L,) aor. ـَ {يَقْفَخُ}, (L,) inf. n. قَفْخٌ and قِفَاخٌ, (Ṣ, L, Ḳ,) He struck him, or it: but the striking termed قفخ is only on the head, or on something hollow, (Ṣ, L, Ḳ,) or on something hard [evidently a mistake for moist, or soft]; (L;) i. q. فَقَخَهُ, (Ḳ,) and used by the people of El-Yemen in the sense of صَقَعَهُ: (L:) he struck a person's head with a staff: (L:) he struck a person on the head with a staff. (Aṣ.) He broke a person's head: he broke a thing across: he broke the substance called عَرْمَض upon the surface of water. (L.)