unbuttoning a collar; opening one's collar
Refers to the act of loosening or unbuttoning the collar area of clothing, often for comfort or style.
On hot days, I unbutton my collar and loosen my tie.
opening up one's heart; being open-hearted
Metaphorical use: revealing one's true feelings or being frank and approachable. Often used in set phrases like 開襟の態度.
He answered our questions with an open-hearted attitude.
Abbreviation of 開襟シャツ. Refers to a shirt with an open collar, typically worn without a tie.
See also: 開襟シャツ
Today I went to work in an open-necked shirt.
open-necked shirt
Standard kanji spelling for all senses.
Variant kanji form using 衿 instead of 襟; less common.
Compound of 開 (kai, 'open') and 襟 (kin, 'collar'). The metaphorical sense 'open-hearted' derives from the image of opening one's collar to reveal the chest, symbolizing frankness.