Pronunciation: /rɪˈɡrɛtəbl/
adjective expressing or causing regret or sorrow; unfortunate
A1 It was regrettable that I forgot to bring my umbrella on a rainy day.
A2 It's regrettable that he didn't pass the exam despite studying hard.
B1 The decision to cancel the event at the last minute was regrettable.
B2 It's regrettable that the company had to lay off so many employees.
C1 The lack of action on climate change is a regrettable oversight by world leaders.
C2 The loss of such a talented artist at a young age is truly regrettable.
formal It is regrettable that the project was not completed on time.
informal I heard about the regrettable situation with the car accident.
slang It's really regrettable that we can't go to the concert tonight.
figurative The missed opportunity was truly regrettable.
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regrettables
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to regret
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regretting