καταδιαιτᾶν

From LSJ

ἐπὶ πολλῆς ἡσυχίας καὶ ἠρεμίας ὑμῶν → leaving you entirely at rest

Source

Greek > English (Woodhouse Verbs Reversed)

(see also: καταδιαιτάω) decide as arbitrator against a person, give a decision against