Synonyms of the word

tremulous

• adj. Trembling, quivering, or shaking.
• adj. Timid, hesitant, or unconfident.

quavering

• v. present participle of quaver.
• adj. Trembling, or prone to trembling and shaking.
• n. The act of something that quavers.

unsteady

• adj. Not held firmly in position, physically unstable.
• adj. Noted for lack of regularity or uniformity.
• adj. Inconstant in purpose, or volatile in behavior.
• v. To render unsteady, removing balance.