From mesos; a go-between, i.e. (simply) an internunciator, or (by implication) a reconciler (intercessor) -- mediator.

see GREEK mesos

μεσίτῃ (mesitē) − 1 Occurrence

μεσίτης (mesitēs) − 4 Occurrences

μεσίτου (mesitou) − 1 Occurrence