You

You comes from the Proto-Germanic demonstrative base *juz-, *iwwiz from Proto-Indo-European *yu- (second-person plural pronoun).

As in many other European languages, English at the time had a T–V distinction, which made the plural forms more respectful and deferential; they were used to address strangers and social superiors.

Because of the loss of the original singular-plural distinction, many English dialects belonging to this group have innovated new plural forms of the second person pronoun.

Examples of such pronouns sometimes seen and heard include: You prototypically refers to the addressee along with zero or more other persons, excluding the speaker.

Since English lacks a distinct first person singular imperative mood, you and let's function as substitutes.