adj. Of an event, action, or state, allowing or deserving regret.
The Century Dictionary and Cyclopedia
Admitting of or calling for regret.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. deserving regret
Word Usage
"We remain at a high level of alert, but sometimes it is possible that they slip through our defences as they did in Pune, Mumbai and Delhi, which I described as regrettable 'blots' on our recordā¦."