Lexical Definition

‎ἰσόψυχος‎ isópsychos (ee-sop'-soo-khos) like-minded ^G:A
from ‎ἴσος‎ and ‎ψυχή‎

likeminded.

• of similar spirit

Abbott-Smith

ἰσόψυχος -ον (< ἴσος, ψυχή), [in LXX: Ps 54(55):13* (כְּעֶרְכִּי)*;]
1. of equal spirit (Æsch., Agam., 1470).
2. like-minded: Phl 2:20.†

Abbott-Smith References

Liddell-Scott-Jones

ἰσόψυχος-ψῡχος, ον,

of equal spirit, κράτος ἰ. [Refs 4th c.BC+]. adverb -χως, μάχεσθαι [Refs]

__2 of like soul or mind, [NT]

_{LSJ Scripture Refs: Phil.2.20}