無我夢中|むがむちゅうmugamuchuu[1]atamadaka (head-high)

1. nounlosing oneself (in); being absorbed (in); forgetting oneself
   私は無我夢中むがむちゅうで部屋へやを飛び出とびだした。↗

   I ran out of the room without knowing what I was doing.

• Synonym一心不乱いっしんふらんWrittenWritten/formal prose. Suggests single-minded concentration with no distractions; 「無我夢中」 stresses losing yourself to the point of throwing caution aside.
• Synonym夢中むちゅうNeutralNeutral and common in speech. Covers being absorbed in or crazy about something; 「無我夢中」 is its intensified form, as in 「無我夢中で逃げた」.
• Synonym没頭ぼっとうWrittenWritten/formal prose. Means burying yourself in a task; 「無我夢中」 puts more weight on forgetting yourself entirely.
• Related熱中ねっちゅうNeutralNeutral. Means being keen on or enthusiastic about something; 「無我夢中」 goes further, stressing absorption so deep you forget yourself.

Use 「夢中」 for being absorbed in or crazy about something, 「熱中」 for enthusiasm, and 「没頭」 for burying yourself in a task. For losing yourself completely, heedless of all else, pick 「無我夢中」; for single-minded focus, 「一心不乱」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 一ひとつの事ことに心こころをとらわれて、我われを忘わすれるほど熱中ねっちゅうすること。