βρόχος, -ου, ὁ, [in LXX: Pro.6:5 (יָד) 7:21 (חֵלֶק) 22:25 (מוֹקֵשׁ), 3Ma.4:8 * ;] a noose, a slip-knot, a halter: metaph., a restraint (not, as AV, R, txt., a snare): 1Co.7:35.† (AS)
Thayer:
1) a noose, slip-knot, by which any person or thing is caught, or fastened, or suspended 2) to throw a noose upon one, a figure borrowed from war or the chase so that by craft or by force one is bound to some necessity, to constrain him to obey some command
βρόχος
brochos
brokh'-os
Of uncertain derivation; a noose