To express strong disapproval or regret about something; to bewail or lament (archaic/rare form).
Directly from Latin deplorare (de- + plorare, 'to weep'), meaning to weep over or express grief. This is a back-formation or variant of the more common 'deplore,' preserving the Latin verb form more directly.
English has largely abandoned this form in favor of 'deplore,' but it survives in historical texts and legal language, showing how word forms can go extinct even when their meaning never dies.
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