affairs
Synonym discussion
Sense: noun/1
For noun/1, affairs is broader and a little more formal than matter. Matter often points to one specific question, as in a private matter, while affairs can cover a whole area of life or a connected set of topics, such as family affairs or campus affairs. Issue usually suggests a problem or a point of disagreement, so it suits debate better than routine daily affairs. Concern adds a sense of worry or responsibility. Business overlaps with affairs in practical contexts, but it sounds more official and work-focused. You might discuss current affairs in class, settle family affairs after a death, raise an issue at a meeting, or tell a friend that something is a private matter.
Etymology
Affairs is the plural form of affair. Affair came into English through Old French from a verb meaning 'to do' or 'to make', and it first referred to what had to be done. That older idea still shows in senses about matters that need attention and business someone manages. English later widened the word to cover scandals, secret relationships, events, and even objects described in a certain way.
First known use
14th century
14th century, in the meaning defined at sense 1a