regret

1 regret /rɪˈgrɛt/ verb
regrets; regretted; regretting
1 regret
/rɪˈgrɛt/
verb
regrets; regretted; regretting
Britannica Dictionary definition of REGRET
[+ object]
1 
: to feel sad or sorry about (something that you did or did not do) : to have regrets about (something)
2 
not used in progressive tenses — used formally and in writing to express sad feelings about something that is disappointing or unpleasant
2 regret /rɪˈgrɛt/ noun
plural regrets
2 regret
/rɪˈgrɛt/
noun
plural regrets
Britannica Dictionary definition of REGRET
1 
: a feeling of sadness or disappointment about something that you did or did not do
[count]
[noncount]
2 
regrets [plural] : a statement saying politely that you will not be able to go to a meeting, party, etc.