You win if you chose "prize"! "Appreciable" and "prize" both come from a family of words that has to do with measurement or value. The words in this family stem from the common ancestor "pretium," the Latin word for "price, money, value." "Appreciable" and its cousin "appreciate" derive from the Latin verb "appretiare," which developed from "pretium" and means "to set a value on." "Pretium" itself was adopted into English as "pris" and used to form the nouns "prize" and "price." Other "pretium" descendants include "precious" ("of great value or high price") and "depreciate" ("to lower the price or value of something").