Strong's #5138: trachus (pronounced trakh-oos')

perhaps strengthened from the base of 4486 (as if jagged by rents); uneven, rocky (reefy):--rock, rough.

Thayer's Greek Lexicon:

́

trachus

1) rough, rocky

1a) of places of the sea

Part of Speech: adjective

Relation: perhaps strengthened from the base of G4486 (as if jagged by rents)

Usage:

This word is used 2 times:

 

Luke 3:5: "straight, and the rough ways shall be made smooth;"
Acts 27:29: "lest we should have fallen upon rocks, they cast four anchors"