-цтво

A variant of -ство (-stvo), with assimilation of -кс- (-ks-) to -ц- (-c-).

• IPA^(key): [t͡stwɔ]

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-́цтво • (-́ctvo) n (plural -цтва)

1. alternative form of -ство (-stvo)

   ‎коза́к (kozák, “Cossack”) + ‎-цтво (-ctvo) → ‎коза́цтво (kozáctvo, “Cossacks”, collective noun)

• This assimilated form occurs in old formations with stems in к- (k-) and ц- (c-, historically velar *k-).