Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Sanskrit दुस्-
Avestan 𐬛𐬎𐬱- (cognate)
Gothic 𐍄𐌿𐌶- (cognate)
Ancient Greek δυσ- (cognate)
Proto-Indo-Iranian *duš- (inherited)
Proto-Indo-Aryan *duš- (inherited)
Proto-Indo-European *dus- (inherited)
Old Irish do- (cognate)
Old Armenian տ- (cognate)

Indonesian dusta (link)
Icelandic tor- (cognate)
Sanskrit दुःख (affix)
Sanskrit दुःस्वप्न (affix)
Sanskrit दुर्जन (affix)
Sanskrit दुर्लभ (affix)
Sanskrit दुर्ग (affix)
Sanskrit दुर्बल (affix)
Sanskrit दुर्मति (affix)
Sanskrit दुर्गा (affix)
Sanskrit दुर्मनस् (affix)
Sanskrit दुर्गन्ध (affix)
Thai ทุ (derived)