guard against (?.)

• advocate
• champion
• clear the decks
• consider every angle
• defend
• flank
• forearm
• guard
• hedge
• leave out nothing
• make sure
• make sure against
• overlook no possibility
• play safe
• prepare for
• protect
• provide a hedge
• provide against
• provide for
• reef down
• safeguard
• screen
• secure
• shield
• shorten sail
• take measures
• take precautions
• take steps