Usage: 9 forms in 18 verses
Form Translated As     In Verse(s)
πιών plentiful LXX.Num.13.20
πιόνων of hearty LXX.Mic.6.7
πίων plentiful LXX.Gen.49.15LXX.Gen.49.20
πίοσιν their plenty LXX.Ps.78.31
πίοσι plentiful LXX.Dan.11.24
πίονι a plentiful LXX.Isa.5.1LXX.Ezek.34.14
plentiful LXX.Ps.92.10LXX.Ps.92.14
πίονεσ hearty LXX.Ps.22.12LXX.Ps.22.29
πίονα a fertile LXX.Neh.9.25
fertile LXX.1Chr.4.40LXX.Isa.30.23
plenty LXX.Isa.17.4
πίον being plentiful LXX.Ps.68.15LXX.Ps.68.15

Liddell-Scott-Jones

πίων (piōn) plenty G:N

πίων [], , ,

neuter πῖον, genitive πίονος (irregular feminine πίειρα, which see), fat, in [Refs 8th c.BC+]; νῶτα βοὸς π. [Refs 8th c.BC+]; π. δημός rich fat, [Refs 8th c.BC+]; ἔγκατα πίονι (perhaps πίονα) δημῷ [Refs 8th c.BC+]; of oil, [Refs 5th c.BC+]

__2 of men, [Refs 5th c.BC+]
__II metaphorically, of soil, rich, ἀγρός, δῆμος, etc., [Refs 8th c.BC+]; πίονα ἔργα rich crops,[Refs 5th c.BC+]
__II.2 of persons and places, wealthy, abounding, οἶκος, νηός, [Refs 8th c.BC+]; πίονι μέτρῳ in plenteous measure, [Refs 3rd c.BC+]; abundant, κλαυθμὸς π. [LXX]; ἐν καταφορᾷ πίονι in a state of deep lethargy, [Refs 1st c.AD+]; τὸ πῖον, see at {λιπαρός} 1.2.
__II.3 fattening, fertilizing, Ζέφυρος [Refs 5th c.BC+]
__III comparative πῑότερος, as if from πῖος (which see), [Refs 4th c.BC+]: superlative, πιότατον πεδίον [Refs 8th c.BC+]. adverb, πιοτέρως διαιτᾶν [Refs 5th c.BC+]. (Cf. Sanskrit p[imacracute]van-, feminine p[imacracute]varī 'fat', 'rich'.)

LSJ Scripture Refs: LXX.Gen.46.29