As an adjective purgative
is (capable of) purging.
As a noun purgative
is something, such as a substance or medicine, that purges; laxative.
As an adverb purgatively is
in a purgative manner; so as to purge.
purgative
English
Adjective
(head)
(capable of) purging
Noun
(
en noun)
something, such as a substance or medicine, that purges; laxative