「confidential」の語源 1759, "indicating the confiding of a private intimacy," from Latin confidentia (see confidence) + -al (1). Sense of "intended to be treated as private" is from 1773; that of "enjoying the confidence of another" is from 1805. Related: Confidentially. ChatGPT訳: 1759年、「私的な親密さを示す」という意味…