6 letters · 6 points in Scrabble
adjective mentally or physically infirm with age
origin1660s; borrowed from French sénile, from Middle French senile, from Old French senile, from Latin senīlis (“of or pertaining to old age”), from senex (“old man”), ultimately from Proto-Indo-European *sénos (“old”).
Etymology from Wiktionary, CC BY-SA 3.0