Vacuous
Part of speech: adjective
Definition: Showing a lack of thought or intelligence; vacant
Empty
Part of speech: verb
Definition: to make empty; to void; to remove the contents of
Part of speech: adjective
Definition: devoid of contentContaining no elements (as of a string or array), opposed to being null (having no valid value).
Part of speech: noun
Definition: A bottle previously containing some liquid, especially a drink, and that is now empty.
Example sentence: Thoughts without content are empty, intuitions without concepts are blind.