con-trĕmo, ŭi, 3,
v. n., to tremble greatly, to quake (rare): caelum tonitru contremit, Pac. ap. Cic. de Or. 3, 39, 157 (Trag. Rel. v. 413 Rib.): fulminis horribili cum plagā torrida tellus Contremit, Lucr. 5, 1220.
con-tremō —, —, ere, to tremble, quake: caelum tonitru contremit, Pac. ap. C. ...
An Elementary Latin Dictionary