en·sure 
(ĕn-shr)
(ĕn-shr)tr.v. en·sured, en·sur·ing, en·sures
To make sure or certain; insure: Our precautions ensured our safety. See Usage Note at assure.
[Middle English ensuren, from Anglo-Norman enseurer : Old French en-, causative pref.; see EN-1 + Old French seur, secure, variant of sur; see SURE.]
- flight bag
- flight crew
- flight deck
- flight engineer
- flight feather
- flightily
- flightiness
- flighting
- flight jacket
- flightless
- flight line
- flightline
- flight path
- flight plan
- flight recorder
- flight surgeon
- flight-test
- flightworthiness
- flightworthy
- flighty
- flimflam
- flimflammer
- flimflammery
- flimsily
- flimsiness