jerkily
Adverb
Meaning
with jerking motions
with spasms
Source: WordNetSynonyms
intermittently
irregularly
infrequently
nervously
convulsively
sporadically
variably
eccentrically
haltingly
shudderingly
shakily
brokenly
capriciously
spasmodically
unsteadily
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Antonyms
Examples
She rose stiffly, jerkily from the window seat
the mouth was slightly open, and jerked violently and spasmodically at one corner
His quick transparent lines have the nervous and contracted strength, move as jerkily and intently as a bird."
The Moon appears to move jerkily, and the phases do the same.