Parts of Speech: Adjective, Noun, Verb, Adverb of EASY

Examples
I like English because English is an easy subject to learn. (adjective)
I like English because of it's easiness to learn.(noun)
I can ease the study burden for my brother.(verb)
I make him feel at ease when he studies English.(noun)
I can easily help him (to) study English .(adverb)