Where does “maazi” come from?

maazi (Ingrian) comes from Russian мазь, from Proto-Slavic mazь, from Proto-Slavic -ь, from Proto-Indo-European -is — Forms nouns from verbs.

Ancestry of “maazi”, step by step

StepLanguageWordMeaning
1Russianмазьointment, salve, liniment
2Proto-Slavicmazьgrease, ointment
3Proto-Slavic-ьForms nouns; From adjectives; From participles
4Proto-Indo-European-isForms nouns from verbs
Every word from Proto-Indo-European -is →Every word from Proto-Slavic -ь →Every word from Proto-Slavic mazь →