CONVULSIVELY

convulsively

(adverb) with convulsions, in a convulsive way; “her leg twitched convulsively”

Source: WordNet® 3.1

Etymology

Adverb

convulsively (comparative more convulsively, superlative most convulsively)

In a convulsive manner.

Source: Wiktionary

Con*vul"sive*ly, adv.

Definition: in a convulsive manner.

CONVULSIVE

Con*vul"sive, a. Etym: [Cf. F. convulsif.]

Definition: Producing, or attended with, convulsions or spasms; characterized by convulsions; convulsionary. An irregular, convulsive movement may be necessary to throw off an irregular, convulsive disease. Burke.

Source: Webster’s Unabridged Dictionary 1913 Edition