Where does “tönäri” come from?

tönäri (Finnish) comes from Finnish -äri, from Finnish -ri, from Finnish -ra, from Finnish -i, from Proto-Uralic -j — oblique plural.

Ancestry of “tönäri”, step by step

StepLanguageWordMeaning
1Finnish-äriFront vowel variant of -ari
2Finnish-riUsed to create names of occupations from nouns or...
3Finnish-raForms nouns or adjectives, mostly from nominal...
4Finnish-iA nominal suffix used in eg. ukko → ukki; Used...
5Proto-Uralic-joblique plural
Every word from Proto-Uralic -j →Every word from Finnish -i →Every word from Finnish -ri →