spasmodic

adjective
1
happening suddenly for short periods of time; not regular or continuous
نامنظم, متناوب
2
caused by your muscles becoming tight in a way that you cannot control
تشنجی, اسپاسماتیک, انقباضی, متشنج, تشنجی‌وار, گرفتگی, گرفتگی عضلانی
spasmodic movements