Recurrent (adjective)

Happening again and again, especially at regular intervals.

Origin:

Late middle english: from latin recurrent- 'running back, returning', from the verb recurrere, from re- 'back' + currere 'to run'.

Examples:

1. The recurrent nightmares were causing her distress.
2. The recurrent pain was a sign that something was wrong.
3. The recurrent fever was a cause for concern.
4. The recurrent pattern was a sign that the experiment was successful.
5. The recurrent events were a mystery that the scientist sought to solve.