Today's word comes from page 102 of The Adventures of Augie March, by Saul Bellow.
knar is a noun meaning a knot in wood; esp. a bark covered bulge on a tree trunk or root. It comes from Middle English, knarre which is from Low German knarre, Dutch knar, a stump, knob, knot.
My sentence: I bruised my knuckle when I hit a knar while digging a hole to plant the new bush I won in a drawing on Earth Day.
Anyone else have any experience with knars?