lamentar

v. regret, lament, bemoan

v. lament, moan; bemoan, bewail; weep

= mourn, regret, lament, express + regret.
Ex: I shall neither cheer nor mourn its passing from the current agenda because to do so would be to demonstrate a partisanship that was not presidential.
Ex: Sir Walter Greg also half regretted 'that 'bibliology' is past praying for' since it defined the study more precisely than the accepted word.
Ex: The article 'To perpetuate what is derisory without derision' laments the destruction of books.
Ex: The author expresses regret at the present state of the Association's affairs.
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* lamentarse = grieve, whine, wail.
* lamentarse de = bemoan.

(v.) = grieve, whine, wail
Ex: If we take Cindi, Albert will almost surely grieve. Ex: Nothing you can do about that so no use whining. Ex: At this the Queen wept and wailed; but being a clever woman she thought out a plan whereby to save her son.