the.com/inside

The one preposition that turns every secret into real estate.

means In or into the interior of something — on the inner side rather than the outer one.

from Built in English from 'in' plus 'side,' simply meaning the inner side of a thing — a sturdy compound coined to contrast with 'outside.' No hidden story here: it's exactly as literal as it looks, two plain words fused by long use into one.

origin
literally in plus side, 13th century glue job
info usage
inside info implies theft dressed as access
opposite illusion
outside assumes a boundary that may not exist
the.com · every word