grief, regret, sorrow (emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing)
grief, regret, sorrow (remorse after committing something wrong)
grievance, grudge (animosity or ill will against someone or something caused by disappointment)
complaints, grievances, lamentations, regrets (statements in which someone laments or complains about something)
żale (lyrical work in Old Polish literature expressing complaints about fate, pain due to some misfortune, or grief after someone's death)

to grieve, to pity (to feel sympathy for someone; to feel sorry for someone)
to regret (to feel sadness about something one has or has not done, or about what has passed and what one has lost)
to have a sense of wasting something that is important and valuable, and which one would like to see put to good use

second-person singular imperative of żalić