persistence is the act of continuing in a course of action despite difficulty or opposition — and, by extension, the continuance of an effect after the cause that produced it is gone.
The word entered English in the 1540s from French persistance, itself from persistant, from Latin persistentem, the present participle of persistere: per-, "thoroughly," joined to sistere, "to come to a stand." The literal sense is standing all the way through. Through the sixteenth century the French-derived spelling persistance was common in English before the classical -ence ending prevailed; it survives today only as one of the language's more durable misspellings, which is a fitting fate for the word.
Its neighbors sort by what they imply about the person doing the continuing. 📝perseverance carries moral effort — enduring hardship for the sake of something worth enduring it for. Tenacity emphasizes grip, the refusal to let go. Obstinacy is persistence with the judgment removed, continuing because stopping would be a concession. Persistence itself is the neutral member of the set: it describes the continuing and stays silent on whether continuing is wise. That neutrality is why the word carries the second, technical sense so easily — an afterimage persists on the retina, a signal persists on a line, and since the mid-nineteenth century anything that outlasts its cause can be said to persist. Software borrowed the same sense wholesale: persistent data is state that survives the process that wrote it.
"I didn't come this far to only come this far"