9 letters · 14 points in Scrabble
verb be persistent, refuse to stop
originFrom Middle English perseveren, from Old French perseverer, from Latin persevērāre (“to continue steadfastly, persist, persevere”), from perseverus (“very strict or earnest”), from per (“through, by the means of”) + severus (“strict, earnest”). Doublet of perseverate.
Etymology from Wiktionary, CC BY-SA 3.0