VIGILANTLY
vigilantly, watchfully
(adverb) in a watchful manner
Source: WordNet® 3.1
Etymology
Adverb
vigilantly (comparative more vigilantly, superlative most vigilantly)
In a vigilant manner.
Source: Wiktionary
Vig"i*lant*ly, adv.
Definition: In a vigilant manner.
VIGILANT
Vig"i*lant, a. Etym: [L. vigilans, -antis, p. pr. of vigilare to
watch, fr. vigil awake: cf. F. vigilant. See Vigil.]
Definition: Attentive to discover and avoid danger, or to provide for
safety; wakeful; watchful; circumspect; wary. "Be sober, be
vigilant." 1 Pet. v. 8.
Sirs, take your places, and be vigilant. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition