Other forms: rued; rues; ruing; rueing
To rue is to feel regret or remorse for something. If that position at the deli ended up involving a reality TV show that made everyone famous, you may rue the day you turned down the job.
Rue comes from the Old English word hreowan, meaning "to make sorry," and rue can still sum up a lot of sorrow in one small syllable. Shakespeare made the word famous in phrases like "rue the hour" and "rue the time," meaning you bitterly regret a moment, but did not use the exact phrase "rue the day" which actually occurs in Christopher Marlowe's play Tamburlaine the Great. Another common meaning of rue refers to a strong-scented herb often used for medicinal purposes back in the day. A lot of written works make puns where the plant alludes to sorrow and pain.