From παρά, beyond, and βαίνω, to go. A transgressor, therefore, is one who goes beyond the line. So, also, trespass, which is transpass, from the Latin trans, across, and passus, a step. A similar word occurs in Homer, ὑπερβασία, a transgression or trespass, from ὑπέρ, over, and βαίνω, to go.