ichidan verb
dissuade; talk out of; make someone give up an idea
Causative of 思い切る (to give up/resolve). Used when actively persuading someone to abandon a plan or intention.
彼を留学の計画から思い切らせるのは難しかった。
It was difficult to dissuade him from his plan to study abroad.
危険な投資
I explained the risks in detail to make him give up the idea of the dangerous investment.