Persistent

google

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mid 16th century: from French persistance, from the verb persister ; influenced in spelling by Latin persistent- ‘continuing steadfastly’.

wiktionary

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From Latin persistēns, present participle of persistō(“to continue steadfastly”). Synchronically analyzable as persist +‎ -ent.

etymonline

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persistent (adj.)

1723, "enduring," at first mostly in botany, from persistence or from Latin persistentem (nominative persistens), present participle of persistere (see persist). Meaning "continuing in spite of opposition, warning, etc." is by 1830. Shakespeare used persistive. Related: Persistently.