Mehri

dēhər - period of time (usually a year or a century) (ML 67)

dahr- ‘time, period of time; age, duration of life; eternity’ (Lane 923)

Areal reconstruction

*dhr - to go around (DRS 230, EDA II)

A variant root to PS *dwr. At least some of the MSA lexemes may be borrowed from Arabic.