injectable vs inject

injectable is an adjective but inject is not an adjective.

Word	Noun	Adjective	Verb	Adverb
injectable	No	Yes	No	No
inject	No	No	Yes	No

injectable (adjective)	inject (adjective)
(used of drugs) capable of being injected

injectable (verb)	inject (verb)
	give an injection to
	to introduce (a new aspect or element)
	to insert between other elements
	feed intravenously
	take by injection
	force or drive (a fluid or gas) into by piercing