It is an adjective.
Meaning: It means isolated.The root of the word is clud/clus/claus/clois which indicates cloister, cluster.This is used to indicate that one is shut off from world, often for religious reasons.
Etymology: The word recluse is from Latin word "recludere" which means 'shut up'.
Historically, the word is used to refer to the perfect isolation of a hermit.
reclusively - adverb,
reclusiveness - noun.
Synonyms: cloistered, withdrawn, ascetic, secluded, solitary, antisocial, misanthropic,sequestered.
1)His reclusive nature is mistaken by many for arrogance.
2)He live in unsocial reclusive life.
3)The fruit vendor is sitting under the reclusive calm of a shade tree.
4)I am reclusive and I don't allow anyone to touch my things or interfere in my issues.