You

thou \thou\ ([th]ou), pron. [Sing.: nom. {Thou}; poss. {Thy}
   ([th][imac]) or {Thine} ([th][imac]n); obj. {Thee}
   ([th][=e]). Pl.: nom. {You} (y[=oo]); poss. {Your} (y[=oo]r)
   or {Yours} (y[=oo]rz); obj. {You}.] [OE. thou, [thorn]u, AS.
   [eth][=u], [eth]u; akin to OS. & OFries. thu, G., Dan. & Sw.
   du, Icel. [thorn][=u], Goth. [thorn]u, Russ. tui, Ir. & Gael.
   tu, W. ti, L. tu, Gr. sy`, Dor. ty`, Skr. tvam. [root]185.
   Cf. {Thee}, {Thine}, {Te Deum}.]
   The second personal pronoun, in the singular number, denoting
   the person addressed; thyself; the pronoun which is used in
   addressing persons in the solemn or poetical style.
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         Art thou he that should come?            --Matt. xi. 3.
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   Note: "In Old English, generally, thou is the language of a
         lord to a servant, of an equal to an equal, and
         expresses also companionship, love, permission,
         defiance, scorn, threatening: whilst ye is the language
         of a servant to a lord, and of compliment, and further
         expresses honor, submission, or entreaty." --Skeat.
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   Note: Thou is now sometimes used by the Friends, or Quakers,
         in familiar discourse, though most of them corruptly
         say thee instead of thou.
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You \You\ ([=u]), pron. [Possess. {Your} ([=u]r) or {Yours}
   ([=u]rz); dat. & obj. {You}.] [OE. you, eou, eow, dat. &
   acc., AS. e['o]w, used as dat. & acc. of ge, g[=e], ye; akin
   to OFries. iu, io, D. u, G. euch, OHG. iu, dat., iuwih, acc.,
   Icel. y[eth]r, dat. & acc., Goth. izwis; of uncertain origin.
   [root]189. Cf. {Your}.]
   The pronoun of the second person, in the nominative, dative,
   and objective case, indicating the person or persons
   addressed. See the Note under {Ye}.
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         Ye go to Canterbury; God you speed.      --Chaucer.
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         Good sir, I do in friendship counsel you
         To leave this place.                     --Shak.
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         In vain you tell your parting lover
         You wish fair winds may waft him over.   --Prior.
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   Note: Though you is properly a plural, it is in all ordinary
         discourse used also in addressing a single person, yet
         properly always with a plural verb. "Are you he that
         hangs the verses on the trees, wherein Rosalind is so
         admired ?" --Shak. You and your are sometimes used
         indefinitely, like we, they, one, to express persons
         not specified. "The looks at a distance like a
         new-plowed land; but as you come near it, you see
         nothing but a long heap of heavy, disjointed clods."
         --Addison. "Your medalist and critic are much nearer
         related than the world imagine." --Addison. "It is
         always pleasant to be forced to do what you wish to do,
         but what, until pressed, you dare not attempt." --Hook.
         You is often used reflexively for yourself of
         yourselves. "Your highness shall repose you at the
         tower." --Shak.
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34 Moby Thesaurus words for "you":
      I, I myself, alter, alter ego, alterum, better self, ego,
      ethical self, he, her, herself, him, himself, inner man,
      inner self, it, me, my humble self, myself, number one, oneself,
      other self, ourselves, self, she, subconscious self,
      subliminal self, superego, them, themselves, they, yours truly,
      yourself, yourselves