affair

nouns

a vaguely specified concern
"several matters to attend to"; "it is none of your affair"; "things are going well"
affair, matter, thing
a usually secretive or illicit sexual relationship
affair, affaire, amour, intimacy, involvement, liaison
a vaguely specified social event
"the party was quite an affair"; "an occasion arranged to honor the president"; "a seemingly endless round of social functions"
affair, function, occasion, social function, social occasion