-tzino.

Headword: 
-tzino.
Principal English Translation: 

common ending used w/ preterite or command forms in conjunction w/ use of causative or applicative (-tia, -ltia, -ilia, -lilia) in the reverential sense

Attestations from sources in English: 

ximotlalitzino = sit down
ximocalaquilitzino = come in

(see Horcasitas pp. 59–60)