The headword - third person plural aorist indicative active of ὄζω - appears at Exodus 8:14 LXX, of the aftermath of the plague of frogs. The gloss simply explicates the simple verb with one of its attested compounds. (For προσώζεσαν cf. e.g. Psalm 37.6 LXX.) See LSJ entries for the two verbs at web addresses 1 & 2.