هد

7 انهدّ ذ It (a building) [ fell down: or] became demolished at once, with a vehement noise: (Msb:) and ↓ هَدَّ, aor. هَدِ3َ , it (a wall) fell down; mentioned by AHei; and also by Es-Semeen, who concedes it; (MF;) but this form of the verb is commonly known only as transitive. (TA.) ― -b2- It (a mountain) broke down. (S, L.)