This is the 11383rd most frequent French word.
regrettait
"Regrettait" means "was regretting" or "regretted."
In this sentence, 'regrettait' is in the imparfait tense, indicating a past, ongoing feeling of regret.
Elle regrettait son choix.
She regretted her choice.
Here, 'regrettait' is used to express a personal feeling of regret about not attending the event in the past.
Il regrettait de ne pas être venu à la fête.
He regretted not coming to the party.
This usage conveys a collective regret or nostalgia for times that have passed, using 'regrettions' in the imparfait tense.