imperative
noun
°The grammatical mood expressing an order (see jussive). In English, the imperative form of a verb is the same as that of the bare infinitive.
"The verbs in sentences like "Do it!" and "Say what you like!" are in the imperative."
°A verb in imperative mood.
adjective
°essential.
°Having a semantics that incorporates mutable variables.
synonyms: imperative mood