the.com/invisible

the absence of evidence that somehow runs your whole life

means Not able to be seen, whether literally hidden from sight or simply overlooked.

from From Latin 'invisibilis' — 'in-' (not) plus 'visibilis' (able to be seen), from 'videre,' to see. The same 'videre' fans out into a huge family: vision, video, evident, survey, even 'idea' through its Greek cousin. So 'invisible' is, quite literally, the un-seeable — built from the same root that gave us every word for looking.

true invisibility
would require eyes that catch no light, leaving you blind
clear creatures
glass frogs reveal their beating hearts through transparent skin
dark matter
makes up most of the universe, never seen
air
the most ignored thing keeping you alive
radio waves
invisible light flooding the room you sit in
for instance

the invisible man — h.g. wells' 1897 novel about a scientist who discovers invisibility serum

invisible ink — substance used by spies and children since at least the 18th century to write hidden messages

invisible hand — adam smith's 1776 economic concept describing how self-interest drives market efficiency

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