Dictionary entry

τραχύς

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament with Strong's

τραχύς, -εῖα, -ύ

[in LXX: Is 40:4 (רֶכֶס), etc.;]

rough: ὁδοί (Is, l.c.), Lk 3:5^(LXX); τοποί (i.e. rocky), Ac 27:29.†