Definify.com

Webster 1913 Edition

adv.

Almost; nearly.

Chaucer.

adv.

[well and nigh.] Almost; nearly.

See also: well nigh

well-nigh ‎(not comparable)

almost, very nearly
- 1910, Erwin Rosen, In the Legion, HTML edition, The Gutenberg Project, published 2012:
  There was only one objection to the fulfilment of this wish: the regimental coffers were wellnigh empty.

almost