v. to shudder, tremble, shake
n. shudder, tremble, shake

Ahrk fin zul, rok drey kod, nau tol morokei frod, rul lot Taazokaan motaad voth kein!
And the Voice, he did wield, on that glorious field, when great Tamriel shuddered with war!
(Book, Songs of Skyrim)

The shaking or trembling of the earth as from some cataclysm or great power. Does not refer to fear as in ‘to tremble with fear’.

Possibly related to motmah ‘slip’.