to keep guard before, to guard a place or house, with accusative, (Homeric Hymns) (in the epic 2nd plural imperative προφύλαχθε, for προφυλάσσετε); (Xenophon Historicus); προφυλάσσειν ἐπί τινι to keep guard over a person or place, (Herdotus Historicus):—;absolute to be on guard, keep watch , ἡ προφυλάσσουσα (i.e. ναῦς); = προφυλακίς, (Herdotus Historicus): —;Mid. to guard oneself, to be on one's guard, take precautions , (Herdotus Historicus):—;with accusative to be on one's guard or take precautions against , Lat. cavere, (Herdotus Historicus) (ML)