Definition of snithe:
(v) :
(transitive, now chiefly dialectal, Northern England) To cut; to make an incision; to cut off; to lance or amputate; to cut up; to cut so as to kill; to slay an animal; to hew; to cut stone; to cut hair; to cut corn; to reap; to mow.
(adj) :
Sharp; cutting.
(adj) :
(of wind or weather) Cold, piercing.
(v) :
Obsolete spelling of sny (“abound, swarm, teem, be infested”). [(obsolete, rare, intransitive) To move, proceed.]