'inertialize' originates from Modern English, specifically formed from the adjective 'inertial' plus the verb-forming suffix '-ize' (the suffix ultimately from Greek/Latin via Old French), where 'inert' comes from Latin 'iners' meaning 'inactive' and '-ize' meant 'to make or to render'.

'inertialize' developed from Latin 'iners' -> Old French/Latin-derived English 'inert' -> the 19th-century adjective 'inertial' -> the modern verb-forming process that created 'inertialize' as a technical verb in the 20th century.

Initially the root meant 'inactive' or 'without skill/power'; over time the sense shifted into technical usages meaning 'to make inactive' or 'to give inertia', resulting in the modern verb 'inertialize' with those technical senses.