Empty is a related term of inexpressive.
As adjectives the difference between empty and inexpressive
is that
empty is devoid of content; containing nothing or nobody; vacant while
inexpressive is lacking expression or emotion.
As a verb empty
is (ergative) to make empty; to void; to remove the contents of.
As a noun empty
is a container, especially a bottle, whose contents have been used up, leaving it empty .