Meaning of (उपस्त्री) upastree in english
As noun : mistress Ex:  A similar fate befell Peter's beautiful mistress
kept woman courtesan concubine minion without Ex:  Man without women is incomplete.
As adjective : unaccompanied
Other : keep Ex:  They allways keep chitchatting all the time.
Suggested : not accompanied alone with the absence, omission, or avoidance of not with with no or none of lacking a servile follower or subordinate of a person in power a woman who cohabits with a man to whom she is not legally married, especially one regarded as socially or sexually subservient mistress a woman who has authority, control , or power, especially the female head of a household, institution, or other establishment
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(उपस्त्री) upastree
can be used as noun or adjective and have more than one meaning. No of characters: 8 including vowels consonants matras. The word is used as Noun in hindi and falls under Masculine gender originated from Sanskrit language .
Transliteration :
upastrii