untill
conj. C2 Proficiency un·till
conj. a very old way to say 'until'. You might see it in very old books or poems, but it is not used in modern English.
conj. a now-archaic conjunction used to indicate a point in time up to which an action continues. Replaced by 'until' in modern standard English.
He worked hard untill the sun went down.
The old manuscript describes how the soldiers marched untill they reached the river's edge.
In the archaic text, the protagonist remains loyal to his king untill the very moment of his execution, a detail that modern readers might find particularly moving.