-на

Suffix

 * 1) The third person patient suffix, marks the object of the verb.

Usage notes

 * If the subject is in the third person singular, the suffix -нина is used.
 * When -на is at the end of a verb, the suffix is reduced to -н

Suffix

 * 1) the definite article "the" in its distal singular form, female gender.
 * 2) the definite article "the" in its distal plural form, neuter gender.
 * 1) the definite article "the" in its distal plural form, neuter gender.

Suffix
-In other words, it expresses (definite) future tense, something that *will* happen.

Ex) Би нохойтойгоо тэмдэглэнэ. (I will celebrate with my dog)

Би байшин авна. (I will buy a house)

Би маргааш монгол руу ирнэ. (I will come to Mongolia tomorrow)

Etymology 2
From the original stems ending in *-n suffixed with, a locative case suffix.