τέλος
télos
“end, purpose”
4 words in English grow from this root.
Aristotelian
Philosophyἄριστοςáristos
“of the man named best-purpose”
Aristotle
Everydayἄριστοςáristos
“best purpose”
Entelechy
Philosophyἐνen
“having its completion within”
Teleology
Philosophyτέλοςtélos
“study of ends”