In or within something; not outside. As a noun or adjective, it can mean the inner part or the interior side of something.
Formed in English from 'in' + 'side' in the Middle English period. It originally referred simply to the inner surface or area of an object or space.
We talk about being ‘inside’ buildings, but we also say ‘inside information’ and ‘inside jokes’—the word quietly marks who’s included and who isn’t. It’s a spatial word that ended up shaping social boundaries too.
Complete word intelligence in one call. Free tier — 50 lookups/day.