also: そっこん
na-adjective
madly in love; head over heels
Describes being deeply infatuated or completely charmed by someone. Often used in casual, emotional contexts.
彼は彼女にぞっこんだ。
He is head over heels for her.
あのアイドルにぞっこんなファンが多い。
There are many fans who are madly in love with that idol.
adverb
completely; from the heart
Adverbial use meaning 'wholeheartedly' or 'entirely'. Less common than the adjectival sense; often appears in set phrases like ぞっこんほれ込む.
彼の才能にぞっこんほれ込んだ。
I fell completely for his talent.
A verb meaning 'to fall deeply in love' or 'to be captivated'. ぞっこん intensifies this feeling when used together.
Means 'absorbed in' or 'crazy about'. ぞっこん is stronger and specifically romantic or infatuated.
The origin is uncertain. It may be a sound-symbolic word (mimetic) emphasizing deep, wholehearted feeling, possibly related to ぞっこん (thoroughly) in dialects.