Where does “tos” come from?

tos (Old French) comes from Latin tuus, from Russian туз, from Polish tuz, from Polish tu, from Polish być, from Polish móc, from Old Polish móc, from Proto-Slavic moťь — to be able.

Ancestry of “tos”, step by step

tos traces back through two separate lines of ancestry.

via Latin tuus

StepLanguageWordMeaning
1Latintuusyour
2Russianтузace; bigwig; two-oar dinghy
3Polishtuzace; luminary, person of importance in their...
4Polishtuhere
5Polishbyćto be
6Polishmócto be able; may, might; to be allowed
7Old Polishmóccan, may, to be able to
8Proto-Slavicmoťьpower
9Proto-Indo-Europeanmógʰtis
10Proto-Indo-Europeanmeǵʰ-to be able

via Latin tussem

StepLanguageWordMeaning
1Latintussemaccusative singular of tussis
2Latintussiscough
3Proto-Italictussis
4Proto-Indo-Europeantud-ti-scough
5Proto-Indo-European(s)tewd-to push, to hit
6Proto-Indo-Europeanstew-to praise, laud
Every word from Proto-Indo-European meǵʰ-Every word from Proto-Indo-European mógʰtisEvery word from Proto-Slavic moťь