нащрек

• on the alert, on the look-out, on the watch-out, on o.'s guard; with o.'s wits about one; wide awake
• НАЩРЕК съм be on the alert, be on the look-out/watch-out (for), be on o.'s guard, look out, stand by, keep a good look-out (for), be on o.'s P's and Q's
• човек трябва винаги да бъде НАЩРЕК при него you ought to be on your guard with him