open-eyed

adj (a) with open eyes, as in surprise 睁大眼睛的（表示惊讶）: open-eyed in terror 吓得目瞪口呆. (b) watchful; alert 警觉的; 机警的; 警惕的.

opaque, opaquely, opaqueness, OPEC, open, open an account, open cheque, open day, open letter, open out, open prison, open question, open sandwich, open to, open up, open verdict, open vowel, open-air, open-and-shut, open-ended, open-handed, open-handedly, open-handedness, open-heart surgery, open-hearted, open-minded, open-mindedness, open-mouthed, open-plan, open-work, opencast, opener, opening, opening night, opening-time, openly, openness, opera, opera-glasses, opera-house,