easily

As an adverb easily

is comfortably, without discomfort or anxiety.

As an adjective well is

wild.

As adverbs the difference between easily and easefully

is that easily is comfortably, without discomfort or anxiety while easefully is in an easeful way.

As adverbs the difference between easily and efficiently

is that easily is comfortably, without discomfort or anxiety while efficiently is in an efficient manner.

As an adverb easily

is comfortably, without discomfort or anxiety.

As an adjective undefined is

lacking a definition or value.

As adverbs the difference between easily and freely

is that easily is comfortably, without discomfort or anxiety while freely is in a free manner.

As an adjective freely is

free; frank.

As adverbs the difference between easily and seamlessly

is that easily is comfortably, without discomfort or anxiety while seamlessly is in a seamless manner.

As an adjective easiest

is (easy).

As an adverb easily is

comfortably, without discomfort or anxiety.

As adverbs the difference between smoothly and easily

is that smoothly is in a smooth manner while easily is comfortably, without discomfort or anxiety.

As an adjective simple

is uncomplicated; taken by itself, with nothing added.

As a noun simple

is (medicine) a preparation made from one plant, as opposed to something made from more than one plant.

As a verb simple

is (transitive|intransitive|archaic) to gather simples, ie, medicinal herbs.

As an adverb easily is

comfortably, without discomfort or anxiety.