spasmodic

英[spæz'mɒdɪk] 美[spæz'mɑdɪk]

1. affected by involuntary jerky muscular contractions; resembling a spasm;

"convulsive motions"

"his body made a spasmodic jerk"

"spastic movements"

2. occurring in spells and often abruptly;

"fitful bursts of energy"

"spasmodic rifle fire"