silica

work done for free, unpaid work, uncompensated work / work done in vain, work with no favorable end result

to work for free, to work without pay or other compensation / to work in vain, to work with no favorable end result

(archaic, grammar) any word that declines or conjugates / (archaic, grammar) more specifically, a verb

臀鰭: anal fin

尻臀: buttock

running at a moderate pace

"bottom mochi": the result of falling backwards and landing on one's rear

use, way in which something can be used

魔法使い, 魔法遣い: a magic user: a magician, a wizard, a sorcerer