1 (wiktionary) 2 (es.wikipedia) 3 (en.wikipedia) 4 (glosbe)

Verbs Nouns Adjectives/Adverbs Pronouns Prepositions Conjunctions
regret (Advanced search)

Glob1500 regret a feeling of sadness or sorrow about something that is done or that happens n.
NGSL3000 regret To be sorry about something verb
SAT5000 regretful Feeling, expressive of, or full of regret. adj.

Tanaka6000 regret Tanaka6000 regretful Tanaka6000 regretfully Tanaka6000 regrets Tanaka6000 regrettable Tanaka6000 regretted Tanaka6000 regretting

regret {n} (instance of such an emotion) regret {v} (feel sorry about some past thing) regrettable {adj} (of an event, action, or state, allowing or deserving regret) regrettably {adv} (in a manner inspiring or deserving regret)

He is regretful that he couldn't go .	Está arrepentido de no poder ir.
It is regrettable without being able to wait over this .	Es lamentable no poder esperar más de esto.
I regret to say that he is ill in bed .	Lamento decir que está enfermo en cama.
The time will come when you'll regret it .	Llegará el momento en que te arrepentirás.
I regret that I can't help you .	Lamento no poder ayudarte.
He regrets his mistake .	Se arrepiente de su error.
Some day you will regret this .	Algún día te arrepentirás de esto.
That , while regrettable , is true .	Eso, aunque lamentable, es cierto.
I regret that I told you .	Lamento haberte dicho.
I regret to say I cannot come .	Lamento decir que no puedo ir.
He was already regretting it .	Ya se estaba arrepintiendo.
It is regrettable that you did not start earlier .	Es lamentable que no hayas comenzado antes.
He will regret his own words .	Se arrepentirá de sus propias palabras.