ichidan verb, transitive verb
instigate; incite; spur on; set on
Used when someone deliberately provokes or urges another person or animal to take action, often with a negative or aggressive connotation. Can be used for setting a dog on someone or for egging a person on to do something rash.
彼は弟をけしかけて、友達と喧嘩させた。
He instigated his younger brother to fight with his friend.
犬をけしかけて泥棒を追い払った。
He set the dog on the thief and drove him away.