Proto-Indo-European *wisós

→ English virus (derived)

→ English virulent (derived)

→ German Iltis (mention)

→ Ancient Greek ἰός (inherited)

→ Indonesian virus (derived)

→ Indonesian bisa (derived)

→ Kalasha biṣ (inherited)

→ Latin virus (derived)

→ Middle Irish fí (inherited)

→ Sanskrit विष (inherited)

→ Tocharian B wase (inherited)

→ Tocharian A wäs (inherited)