思い込む
1
to be convinced (that);to be under the impression (that);to feel sure (that);to assume (that)
彼が僕にそう思い込ませたのです。
He put the idea into my head.
2
to make up one's mind;to set one's heart on;to be determined (to do);to be bent on
3
to be obsessed (with a thought, idea, etc.);to think about obsessively
Other forms
思いこむ 【おもいこむ】