the.com/inertness

The art of not reacting, chemically or otherwise, even when provoked.

means The quality of being inactive or sluggish, lacking the energy or inclination to move, react, or change.

from From 'inert,' borrowed from Latin 'iners' — literally 'without skill or art,' built from the negating prefix 'in-' plus 'ars/art-' meaning skill or art (the same root that gives us 'art' and 'artisan'). So an inert thing is, at its linguistic root, 'unskilled' or 'untrained' — unable to do anything, including react. The noun suffix '-ness' simply turns the quality into a thing you can name.

noble gases
Helium and neon practically refuse to bond with anything
root word
Latin iners means unskilled or idle
medical use
Inert fillers in pills do nothing on purpose
not laziness
Inertness resists change, laziness just avoids effort
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