vigilant
英 ['vɪdʒɪl(ə)nt]
美['vɪdʒələnt]
	    - adj. 警惕的;警醒的;注意的;警戒的
 
英英释意
- 1. carefully observant or attentive; on the lookout for possible danger;
 - "a policy of open-eyed awareness"
 - "the vigilant eye of the town watch"
 - "there was a watchful dignity in the room"
 - "a watchful parent with a toddler in tow"