Usage: 4 forms in 22 verses
Form Translated As     In Verse(s)
αβάτω an untrodden LXX.Ps.107.40
untrodden LXX.Ps.63.1LXX.Jer.2.6
άβατόσ It is untrodden LXX.Jer.32.43
άβατοσ an impassable LXX.Amos.5.24
an untrodden LXX.Jer.49.33
untrodden LXX.Jer.50.12LXX.Jer.51.43
άβατον an untrodden LXX.Jer.6.8LXX.Jer.12.10LXX.Jer.25.18LXX.Jer.42.18LXX.Jer.44.6LXX.Jer.44.22LXX.Jer.48.9LXX.Jer.49.2LXX.Jer.49.13LXX.Jer.49.17
untrodden LXX.Lev.16.22LXX.Job.38.27LXX.Jer.25.38LXX.Jer.34.22

Liddell-Scott-Jones

ἄβατος (abatos) impassable G:A

ἄβατος, ον,

also η, ον [Refs 5th c.BC+]:— untrodden, ἐρημία[Refs 4th c.BC+]; impassable, of mountains, [Refs 5th c.BC+]; of a river, not fordable, [Refs 5th c.BC+]; εἶναι εἰς ἄβατον to be made desolate, [LXX]: metaphorically, inaccessible, τὸ πόρσω σοφοῖς . κἀσόφοις[Refs 5th c.BC+]

__2 of holy places, not to be trodden, [Refs 5th c.BC+]; ἀβατώτατος τόπος (i.e. οἱ τάφοι) [Refs 4th c.BC+]: metaphorically, pure, chaste, ψυχή[Refs 5th c.BC+]
__2.b as substantive, ἄβατον, τό, adytum, [Refs 4th c.BC+]; = bidental, Διὸς καταιβάτου . [Refs]
__3 metaphorically, φύσις . οἴκτῳ[Refs 1st c.AD+]
__4 of a horse, not ridden, [Refs 2nd c.AD+]; of female animals, [Refs]
__5 ἄβατον, τό, a plant eaten pickled, [Refs 2nd c.AD+]
__II active, . πόνος a plague that hinders walking, i.e. gout, [Refs 2nd c.AD+]

LSJ Scripture Refs: LXX.Jer.29.17*