an enemy or opponent of long standing

from dawn until dark; day and night

To rise early and sleep late; to work or study hard and diligently, often used to describe someone's tireless dedication to a task.

to work tirelessly from morning to night (idiom)

an old grudge or long-standing resentment

a promise or commitment made in the past that remains to be fulfilled

a previous life

a long-cherished ambition is realized

to have a long-cherished wish realized

at ordinary times; in the past