τραχύς (trachýstrakh-oos'adjectiverough)
[Grk] τραχύς LN: 79.84 GK: G5550 Hebrew: אֵיתָן, רֶכֶס
Derivation: perhaps strengthened from the base of ῥήγνυμι (as if jagged by rents);
Strong's: uneven, rocky (reefy)
KJV: --rock, rough.
See: ῥήγνυμι