I. noun
or setfast ˈ ̷ ̷ˌ ̷ ̷
( -s )
Etymology: sit (I) or set (I) + fast (after the phrase sit fast, set fast )
: a callosity with inflamed edges formed on a horse's back by the chafing of the saddle — compare saddle sore
II. adjective
Etymology: sit (I) + fast (after sit fast, v.)
chiefly dialect : fixed , stationary , immovable