Knobby

Part of speech: adjective (a.)

1. Full of, or covered with, knobs or hard protuberances. Dr. H. More.

2. Irregular; stubborn in particulars. [Obs.] The informers continued in a knobby kind of obstinacy. Howell.

3. Abounding in rounded hills or mountains; hilly. [U.S.] Bartlett.