Definition of unregrettable in US English:

unregrettable

adjective

  • Not deserving of or giving rise to regret.

Origin

Mid 18th century; earliest use found in David Mallet (d. 1765), poet. From un- + regrettable.

Pronunciation

unregrettable

/(ˌ)ʌnrɪˈɡrɛtəbl/