思い込む

おもいこむomoikomu

godan verb · intransitive

1. to be convinced (that)
2. to be under the impression (that)
3. to feel sure (that)
4. to assume (that)
5. to make up one's mind
6. to set one's heart on
7. to be determined (to do)
8. to be bent on

Study it in Yanamino