lifeless vs lifelessly

lifeless is an adjective but lifelessly is not an adjective.

Word	Noun	Adjective	Verb	Adverb
lifeless	No	Yes	No	No
lifelessly	No	No	No	Yes

lifeless (adjective)	lifelessly (adjective)
not having the capacity to support life
destitute or having been emptied of life or living beings
lacking animation or excitement or activity
deprived of life; no longer living

lifeless (adverb)	lifelessly (adverb)
	as if dead
	without animation or vitality
	in a lifeless manner