It can be an adjective (describing a noun), an adverb (describing a verb), or a conjunction (connecting two thoughts or other parts of speech).
NOUN:
" The golf course surfaces were freshly mown and even." (meaning level or uniform)
"Numbers can be either odd or even."
ADVERB:
"He was consumed with the thought of getting even."
"Even so, he knew it was he who would be consumed."
CONJUNCTION:
"Now he was certain, even if he had harbored some doubt before."
NOUN:
" The golf course surfaces were freshly mown and even." (meaning level or uniform)
"Numbers can be either odd or even."
ADVERB:
"He was consumed with the thought of getting even."
"Even so, he knew it was he who would be consumed."
CONJUNCTION:
"Now he was certain, even if he had harbored some doubt before."