Abarim Publications' online Biblical Greek Dictionary
The verb φρυγω (phrugo) means to roast or parch. It's not used in the New Testament, but from it derives the noun φρυγανον (phruganon), denoting a dry stick to be used for kindling. This noun is used once, namely in Acts 28:3.
The adjective φρυγιος (phrugios) meaning dry is identical to the ethnonym meaning Phrygian (neither word occurs in the Bible). This is an etymological coincidence, but probably nevertheless attractive as a popular explanation of the name Phrygia.