adjective Etymology: Middle English (Scots), from Latin ~-, vigilans, from present participle of vigilare to keep watch, stay awake, from vigil awake Date: 15th century alertly watchful especially to avoid danger, see: watchful ~ly adverb
VIGILANT
Meaning of VIGILANT in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012