Spasmodic (adjective)

1. Relating to or characterized by spasms.
2. Occurring in sudden, irregular bursts or fits.

Origin:

From latin spasmodicus, from greek σπασμωδής (spasmōdēs, "convulsive"), from σπασμός (spasmos, "spas.m")

Examples:

1. The patient had spasmodic muscle contractions.
2. The spasmodic movements made it difficult for him to walk.
3. Spasmodic laughter can be a symptom of certain medical conditions.
4. The spasmodic traffic made it hard to drive on the road.
5. The spasmodic breathing made it difficult for her to sleep.