Inconsistent
Definition 1 of 3
Pro Tip 1/2
Time Relevance
Use 'inconsistent' when someone's behavior changes over different times or situations. He's been inconsistent with his morning routine, some days he exercises, others he doesn't.
Pro Tip 2/2
Expectation Setting
'Inconsistent' often implies that reliability or predictability is expected but not met. The inconsistent internet connection is frustrating for users who expect steady service.