What is the meaning of Trembler?

One who, or that which, trembles.

Any of various New World passerine birds of the family Mimidae.

The vibrating hammer, or spring contact piece of a hammer break, as of the electric ignition apparatus for an internal combustion engine.

A kind of security alarm triggered by vibrations or shock waves.

to tremble, shake

to tremble; to quiver; to shake

to tremble

Source: wiktionary.org