(a.) Attentive to discover and avoid danger, or to provide for safety; wakeful; watchful\; circumspect; wary.

Argus-eyed acute agog alert all ears all eyes all ready all set armed armed and ready attentive aux aguets avid booted and spurred briefed careful cautious chary circumspect coached cocked covering custodial defensive eager eagle-eyed equipped familiarized fostering good and ready groomed guarded guardian guarding hawk-eyed immunizing in arms in battle array in readiness in the saddle informed keen keen-eyed lidless loaded loaded for bear mature mobilized observant on guard on the alert on the lookout on the mark on the watch open-eyed parental planned prearranged prepared prepared and ready prepped preventive primed prophylactic protecting protective provided prudent psyched up ready ready for anything ripe safeguarding screening set sharp sharp-eyed sheltering shielding sleepless tutelary unsleeping up in arms wakeful wary watchful well-prepared wide-awake with open eyes