beggarly is not a noun while beggar is a noun.

beggarly is an adjective but beggar is not an adjective.

beggarly is not a verb while beggar is a verb.

beggarly (noun)	beggar (noun)
	a pauper who lives by begging

beggarly (adjective)	beggar (adjective)
marked by poverty befitting a beggar
(used of sums of money) so small in amount as to deserve contempt

beggarly (verb)	beggar (verb)
	be beyond the resources of
	reduce to beggary