رعد

رِعْدَةٌ ذ A tremour, quivering, quaking, shivering, or commotion, (S, A, L, Msb, K,) occasioned by fear, (A, L,) or cold, (A,) &c; (L;) and ↓ رَعْدَةٌ signifies the same. (K.)