engaged in or accustomed to close observation;
"caught by a couple of alert cops"
"alert enough to spot the opportunity when it came"
"constantly alert and vigilant, like a sentinel on duty"
experiencing or accompanied by sleeplessness;
"insomniac old people"
"lay sleepless all night"
"twenty watchful, weary, tedious nights"
- You must be watchful of your health.
- They were not very watchful of the traffic lights.
- We should be watchful of computer viruses.
- The guard should be watchful during the night.
Ever anxious and watchful of her mother.出自：She
- alert 警觉的
- vigilant 警戒的
- awake 醒着的
- alarmed 惊恐的
- careful 小心谨慎的
- cautious 谨慎的
- circumspect 细心的
- observant 观察力敏锐的...
- attentive 注意的
- on the alert 注意
- wide-awake 完全醒着的
- sleepless 无眠的
- insomniac 失眠患者