godan verb (-ru), transitive verb
Forceful cutting or slashing motion, often with a single sweeping stroke. The prefix 掻き adds emphasis or a sense of doing something vigorously.
ナイフでロープを掻き切った。
I slashed through the rope with a knife.
彼は封筒を掻き切って中身を取り出した。
He slit open the envelope and took out the contents.