τοί (toi)

1. enclit. Particle, serving to express belief in an assertion, let me tell you, surely, verily , used to express an inference, then, consequently , (Homer); and in [variant datesTragica Adespota, to introduce a general sentiment.
2. to strengthen other Particles, γάρ τοι, ἤτοι, καίτοι, μέντοι, τοιγάρτοι, etc.: compare τἆρα, τἄν, μεντἄν. (ML)