English
inertialess
From inertia + -less.
Formed from inertia + -less
Proto-Indo-European *h₂er- ‘to join’
…
Proto-Italic *artis
Latin ars ‘skill, art’
Latin iners ‘unskilled, inactive’
Latin inertia ‘lack of art or skill, inactivity, indolence’
English inertia
Today it means
adj That has no inertia, or acts without the use of inertia
Language periods are conventional ranges, not dates for this word.
Etymograph / inertialess