the.com/bosom

means The chest or breast area, especially as the seat of emotion, comfort, or intimate closeness — as in 'bosom friend' or 'the bosom of one's family.'

from From Old English 'bosm,' meaning breast or chest, tracing back to a West Germanic root shared with words in old German and Dutch for the same body part. The sense of being held or sheltered came naturally — your bosom is where babies are cradled and secrets are kept — and by extension 'bosom' grew to mean the inner, protected center of anything: the bosom of the earth, the bosom of the church, a bosom friend held close.