Quaveringly

[k'weɪvərɪŋlɪ]

(adv.) in an unsteady quavering manner; 'the man began quaveringly to question the soldier'.

Checked by Curtis--From WordNet

It'll be a bad thing for the town though, if Bulstrode's money goes out of it, said Mr. Limp, quaveringly. George Eliot. Middlemarch.

Checked by Curtis