Where does “mussikkain” come from?

mussikkain (Ingrian) comes from Ingrian mussikka, from Finnish mustikka, from Finnish musta, from Finnish -ntää — Front vowel variant of -ntaa.

Ancestry of “mussikkain”, step by step

StepLanguageWordMeaning
1Ingrianmussikkabilberry
2Finnishmustikkabilberry, "Vaccinium myrtillus"; a common shrub...
3Finnishmustablack; black horse; Elative singular form of...
4Finnish-ntääFront vowel variant of -ntaa
Every word from Finnish -ntää →Every word from Finnish musta →Every word from Finnish mustikka →