Knobby means covered with small hard lumps. Knobby knees, a knobby stick, knobby roots.
It is chiefly American; British English says knobbly, with the extra syllable. It usually describes joints, wood and roots, and it is affectionate more often than critical. The k at the front is silent, as in knee and knock.
1adjectiveknobbyCovered with small hard lumps.
“The old man leaned on a knobby wooden walking stick.”
knobby is a quality of surface.
Also accepted in games: knobbly
From knob + -y.
Etymology from Wiktionary, CC BY-SA