Where does “tanistic” come from?

tanistic (English) comes from English tanist, from Irish tánaiste, from Old Irish tánaiste.

tanistic (English): Relating to a tanist

Definitions

  1. Relating to a tanist

Ancestry of “tanistic”, step by step

tanistic traces back through two separate lines of ancestry.

via English tanist

StepLanguageWordMeaning
1EnglishtanistThe heir presumptive to the chieftainship or...
2Irishtánaistetanist, heir presumptive; deputy prime minister;...
3Old Irishtánaiste

via English ic

StepLanguageWordMeaning
1Englishicrelated or pertaining to; having the character of
Every word from Old Irish tánaisteEvery word from Irish tánaisteEvery word from English tanist