cohortative

A cohortative verb is in one of the volitional moods.  They are always in the first person (just as imperatives are only second person and jussives are third person).  A cohortative verb does not carry the full force of a command (We must do this…), but it conveys a stronger meaning than a simple suggestion or statement of possibility (We could do this…).  The meaning is somewhere in the middle.  In English, a cohortative is often translated with a helping verb such as “let” or “want” or “will,” depending on the context (“Let us do this!”). Thus, the cohortative verb functions as an indirect command; the reader must examine the context to determine the strength of desirability being expressed in each specific instance.

video or KHW chp. 41.1.