RUE, verb transitive ru. [Latin rudo, to roar, to bray.]
To lament; to regret; to grieve for; as, to rue the commission of a crime; to rue the day.
Thy will chose freely what it now so justly rues.
RUE, verb intransitive To have compassion. [Not in use.]
RUE, noun Sorrow; repentance. [Not in use.]
RUE, noun ru. [Gr. Latin ]
A plant of the genus Ruta, of several species. The common garden rue is medicinal, as a stimulant and detergent.