思おもい込こむ

godan verb (-mu), intransitive verb

be convinced; be under the impression; assume

Used when someone firmly believes something, often with と or と思い込む. It commonly implies the belief may be mistaken or too strong.

• 彼かれは自じ分ぶんが正ただしいと思おもい込こんでいる。

  He is convinced that he is right.

• 電でん車しゃは十じゅう時じ発はつだと思おもい込こんでいた。

  I was under the impression that the train left at ten.

godan verb (-mu), intransitive verb

make up one's mind; set one's heart on; be determined

Focuses on a firm personal resolve or fixed intention. Often appears in patterns like 一度思い込んだら, meaning that once someone has set their mind on something, they are hard to stop.

• 一いち度ど思おもい込こんだら、彼かれは最さい後ごまでやり通とおす。

  Once he sets his mind on something, he sees it through to the end.

• 彼かの女じょは海かい外がいで働はたらくと思おもい込こんで、英えい語ごの勉べん強きょうを始はじめた。

  She set her heart on working overseas and started studying English.

godan verb (-mu), intransitive verb

be obsessed with an idea; fixate on; think about obsessively

Describes getting mentally stuck on one idea, worry, suspicion, or interpretation so strongly that it becomes hard to see anything else.

• 悪わるい方ほうに思おもい込こむと、どんどん不ふ安あんになる。

  If you fixate on the negative interpretation, you become more and more anxious.

• 彼かれは一ひとつの考かんがえに思おもい込こむと、周まわりの声こえが聞きこえなくなる。

  When he gets obsessed with one idea, he stops hearing what people around him say.