IPA: /spæzˈmɒdɪkli/
KK: /spæzˈmɒdɪkli/
In a way that occurs in sudden bursts or fits, rather than continuously.
The machine operated spasmodically, causing delays in production.
Spasmodically → It is formed from "spasmodic" (from Greek "spasmos", meaning a sudden involuntary contraction) and the suffix "-ally" (meaning in a manner). The word "spasmodically" means in a manner that is characterized by sudden, irregular bursts or contractions.
Think of sudden, involuntary contractions ('spasmos') happening 'in a manner' ('-ally') — that's why spasmodically means occurring in sudden bursts.