Where does “фехтувальниця” come from?

фехтувальниця (Ukrainian) comes from Ukrainian фехтува́льник, from Russian -льник, from Ukrainian -ль, from Ukrainian -ь, from Proto-Slavic -ь, from Proto-Indo-European -is — Forms nouns from verbs.

Ancestry of “фехтувальниця”, step by step

StepLanguageWordMeaning
1Ukrainianфехтува́льникswordsman
2Russian-льникSuffix appended to nominal stems to create...
3Ukrainian-льUnproductive deverbal suffix used to form nouns denoting a product or a result
4Ukrainian
5Proto-SlavicForms nouns; From adjectives; From participles
6Proto-Indo-European-isForms nouns from verbs
Every word from Proto-Indo-European -isEvery word from Proto-Slavic Every word from Russian -льник