That trembles, in various senses of the verb.

figurative. Tremulous, quivering; quaking, timorous.

That quavers (in various senses).

Changing in intensity, now strong, now faint; flickering, fitful, intermittent; tremulous, unsteady; tending to fade or become dim.

Shaky, trembling; tending to quaver.

That quivers; trembling, tremulous.

In continual motion, quivering.

Trembling.

tremulous.

that shakes or trembles.

figurative and in extended use. Resembling (that of) an ague; characteristic of an ague; esp. (a) coming in fits and starts or alternating bouts…

Of persons, their limbs, etc.: Characterized or affected by trembling or quivering from nervous agitation or weakness, of mental or physical origin…

That trembles or quivers, as with fear, excitement, etc.; characterized or affected by trembling or quivering; tremulous, shaking. Cf. twitter, v.1…

Vibrating, quivering.

Twitching, trembling.

Characterized by a shaking, quivering motion, or appearance of motion.

Of things: Trembling, shaking, fluttering.

Quivering, trembling.

That quivers; characterized by quivering; tremulous.

Tremulous; trembling.

Full of trembling; tremulous.

Quivering, vibrating.

Of, pertaining to, or characterized by trepidation or tremor.

Characterized or accompanied by shuddering.

Apt to tremble or totter, from age or infirmity; shaky.