dus- / Indo-European roots
Bad, evil; mis- (used as a prefix).Derivative of deu-1
1. dys- from Greek dus-, bad.
2. Durga from Sanskrit Durgā, Durga (short for durgā devī, goddess who is difficult to approach), from durgā, feminine of durga-, difficult to approach, from dus- (becoming dur- before voiced consonants), bad, difficult (*-ga-, going, coming; see gwā-)
[Pokorny dus- 227.]