Arabic Verb تَسْتَمْنِينَ • (tastamnīna) (form X) /tas.tam.niː.na/ inflection of اِسْتَمْنَى (istamnā): second-person feminine singular/plural non-past active indicative second-person feminine plural non-past active subjunctive/jussiveWikiwand - on Seamless Wikipedia browsing. On steroids.