411 REFERENCE · Wiktionary
-sən
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Appendix:Variations of "sen"
Azerbaijani
Etymology
az trk-oat ـسن -sen, -sin, -san, -sın, ultimately from az trk-pro *sen. Cognate with tr -sin. Compare az -əm first-person singular suffix from trk-cmn-pro *ben (see az mən I).
Suffix
san sən
az suffix
Second-person singular present simple copula (used suppletively in place of az *imək):
[you (singular)] are