Where does “sencha” come from?

sencha (English) comes from Japanese 煎茶, from Japanese 茶, from Japanese 葉, from Middle Chinese 葉.

sencha (English): A form of Japanese green tea made by infusing the...

Definitions

Step	Language	Word	Meaning
1	Japanese	煎茶	sencha; any medium-grade green tea, as opposed to...
2	Japanese	茶	tea; brown
3	Japanese	葉	leaf, needle, blade; a season, an age: a shorter...
4	Middle Chinese	葉	—