featurelessly

As a noun terms

is .

As an adverb featurelessly is

in a featureless way; without features.

As a noun feature

is (label) one's structure or make-up; form, shape, bodily proportions.

As a verb feature

is to ascribe the greatest importance to something within a certain context.

As an adverb featurelessly is

in a featureless way; without features.

As an adjective featureless

is without features.

As an adverb featurelessly is

in a featureless way; without features.