fond
t adjective [PREDIC.] (fond of) having an affection or liking for: I’m very fond of Mel | he was not too fond of dancing.

n [ATTRIB.] affectionate; loving: I have very fond memories of Oxford.
n [ATTRIB.] (of a hope or belief) foolishly optimistic; naive.

—DERIVATIVES
fondly adverb
fondness noun.
—ORIGIN late Middle English (in the sense ‘infatuated, foolish’): from obsolete fon ‘a fool, be foolish’, of unknown origin. Compare with FUN.

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Does your behaviour change when your talking to someone that you are fond of? Do you have a fond phrase, a greeting, a tone of voice etc?