bitterly regret (something one has done or allowed to happen) and wish it undone

Ferguson will rue the day he turned down that offer

she might live to rue this impetuous decision

repentance; regret

with rue my heart is laden

a perennial evergreen shrub with bitter strong-scented lobed leaves which are used in herbal medicine

Specifically. A hedgerow (also more fully "hay-rew", "hedge-rew").