The Proto-Indo-European word for "dog"

Comparative linguistics lets us reconstruct the word for "dog" in the Proto-Indo-European (PIE) language:

/*ḍčæṕ^@Ẍøя̃^wo_s/

From that prototypical lexeme, the words for "dog" in all Indo-European languages can be derived by systematic sound shifts:

• /*ḍčæṕ^@Ẍøя̃^wo_s/
     elision of plosives /ḍ/, /ṕ^@/ before sibilant and fricatives, elision of vowel /ø/ between nasal consonants
   → /*čæẌя̃^wo_s/
     softening of /č/ in word-initial position, denasalization and devoicing of /Ẍ/, palatalization of /я̃^w/, phonemization of final sub-sibilant, front-shift of /æ/
   → Greek syclos "dog"
     loss of medial palatal clusters, palatalization of /s/ in stressed syllable
   → Lithuanian šuo "dog"
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → cachorro
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → perro
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → cane
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → chien
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → hund
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → dog
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → pas
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → sabaka
• /*ḍčæṕ^@Ẍøя̃^wo_s/ → (devoicing of /ḍ/, aspiration of /ṕ^@/ in pre-nasal fricative position, apocope of /o_s/) → /*ṭčæẖẌøя̃^w/ → (de-aspiration, rounding of vowels, de-nasalization of trill, suppression of front glide) → Basque txakur "dog"
• /*ḍčæṕ^@Ẍøя̃^wo_s/ →