Umquhile adv. : Some time ago; formerly.

Umquhile a. : Former.

Example:
what color do you think of when i say...?

Taxonomy
World Wide Words, e-magazine, weird words, spelling, Etymology, English language, Ancillary, Last November, one of three, three words, meanings, quondam, correspondent, Mark Harvey, Scrabble, prose, Old English, ymb.

Defination from the web:
... It's from the Old English ymb hwíle, which progressively changed to umbewhitle and hence to umwhile or umquhile. ... in The Fair Maid of Perth (1828): "The Lady of the umquhile Walter de Avenel was in very weak health in the Tower ...