Quenya 

ca(na)sta

fraction. one fourth, one fourth, *quarter

A word appearing as kanasta, kasta, or kansat “1/4” in notes on numbers from the late 1960s, a combination of canta “four” with the fractional suffix -sta.

Conceptual Development: The Early Qenya Grammar of the 1920s had ᴱQ. kantasto “quarter, [one] fourth” with adjective form ᴱQ. kantast(y)a (PE14/51, 84), combinations with the 1920s fractional suffix ᴱQ. -sto.