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Welsh taw
Proto-Celtic *tāti (inherited)
Proto-Celtic *tawsos (inherited)
Irish (cognate)
Proto-Indo-European *steh₂- (inherited)
Proto-Indo-European *teh₂ws- (inherited)
Sanskrit तूष्णीम् (cognate)
Old Irish at·tá (cognate)

Welsh ta (link)
Welsh ta (link)
Welsh ta (link)
Welsh gwrando (compound)
Welsh tewi (affix)
Welsh tawel (mention)
Welsh distaw (affix)
Irish (cognate)
Irish clois (cognate)
Manx ta (cognate)
Old Irish (cognate)
Old Irish adcota (cognate)