The 2nd person pronouns of a language distinguish multiple degrees of politeness towards an addressee.  For instance, Marathi uses <i>tu</i> to address family members and close friends, <i>te</i> or <i>he</i> 'you.SG.HON' for individuals of higher status, and <i>Äpan</i> 'you.SG.HON' for teachers, priests, and very formal situations.

<br><br><b>Reference</b><br>
Helmbrecht, Johannes. 2008. Politeness Distinctions in Pronouns.
In Haspelmath et al (2008), chapter 45.Available online at <a href="http://wals.info/feature/45">
http://wals.info/feature/45</a href>.
