Persian سست

← Old English þrēotan (cognate)

← Proto-Indo-European *trewd- (inherited)

← Proto-Iranian *θrusta- (inherited)

← Northern Kurdish sist (cognate)

← Sanglechi sust (cognate)

← Talysh сыс (cognate)

← Old Armenian շուշտ (cognate)

→ Hindi सस्ता (borrowed)

→ Hindi सुस्त (borrowed)

→ Georgian სუსტი (borrowed)