Where does “trisemajna” come from?

trisemajna (Esperanto) comes from Esperanto semajno, from French semaine, from Middle French sepmaine, from Old French semaine, from Latin septimāna, from Latin septimānus, from Latin septimus, from Latin Septem — seven.

trisemajna (Esperanto): three-week

Definitions

  1. three-week

Ancestry of “trisemajna”, step by step

trisemajna traces back through two separate lines of ancestry.

via Esperanto semajno

StepLanguageWordMeaning
1Esperantosemajnoweek
2Frenchsemaineweek
3Middle Frenchsepmaineweek
4Old Frenchsemaineweek
5Latinseptimānaweek
6Latinseptimānusof or pertaining to the seventh in a series
7Latinseptimusseventh
8LatinSeptemseven; 7
9Proto-Italicseptemseven
10Proto-Indo-Europeanseptḿ̥seven

via Esperanto tri

StepLanguageWordMeaning
1Esperantotrithree
2EnglishthreeA numerical value after two and before four....
3Middle Englishthrethree
4Old Englishþrīthree
5Proto-West Germanicþrīʀthree
6Proto-Germanicþrīzthree
7Proto-Indo-European*tréyes
Every word from Proto-Indo-European septḿ̥Every word from Proto-Italic septemEvery word from Latin Septem