Knobby
Knobby , adjective
[From Knob.]
1.
Full of, or covered with, knobs or hard protuberances. — Dr. H. More
2.
Irregular; stubborn in particulars. [Obsolete]
The informers continued in a knobby kind of obstinacy.
3.
Abounding in rounded hills or mountains; hilly. [United States] — Bartlett