The word cautiously can be used in the place of warily.
Scarily bearly.
cautiously, carefully, warily, charily, circumspectly, delicately; heedfully, watchfully, vigilantly, attentively; hesitantly, timidly.
Warily is an adverb.
Warily means cautious or careful.
Warily is an adverb, yes.Some example sentences are:The tiger eyed the human warily.The police warily watched his movements.
I eyed the rattlesnake warily.
I warily looked both ways before crossing the street.
I warily look both ways when I go across the road to get on the bus.
The wolves tread warily on the thinned ice over the frozen lake.
The student warily looked down the hall to avoid getting a detention by any passing teachers.
carelessly
warily