思(おも)い込(こ)むto be under impression that, to be convinced that, to imagine that, to set one's heart on, to be bent on

多(おお)くの市民(しみん)がデマを本当(ほんとう)だと思(おも)い込(こ)んだ。

Many citizens were under the impression that the rumors were true. {to be under impression that, to be convinced that, to imagine that, to set one's heart on, to be bent on}

他人(たにん)の傘(かさ)を自分(じぶん)の傘(かさ)だと思(おも)い込(こ)んでしまった。

I mistakenly convinced myself that someone else's umbrella was mine. {to be under impression that, to be convinced that, to imagine that, to set one's heart on, to be bent on}

自信(じしん)家(か)の彼女(かのじょ)は、いつも成功(せいこう)すると思(おも)い込(こ)んでいます。

She, being confident, is always under the impression that she will succeed. {to be under impression that, to be convinced that, to imagine that, to set one's heart on, to be bent on}

どうやら、父(ちち)は一度(いちど)思(おも)い込(こ)んだらその後(ご)は絶対(ぜったい)に譲(ゆず)らない性格(せいかく)らしい。

It seems that once my father has made up his mind about something, he absolutely refuses to budge. {to be under impression that, to be convinced that, to imagine that, to set one's heart on, to be bent on}

パートナーは思(おも)い込(こ)むと一直線(いっちょくせん)で、その状態(じょうたい)になると私(わたし)の意見(いけん)を聞(き)こうとしません。

My partner is single-track minded once he is bent on something, and when he gets that way, he doesn't listen to my opinions. {to be under impression that, to be convinced that, to imagine that, to set one's heart on, to be bent on}