festi -fes- gismu

x₁(s) is/are waste product(s) [left to waste] by x₂ (event/activity).

Also shit, crap; agentive wasting (= fesygau, fesyzu'e). See also xaksu, kalci, pinca.

In notes:

kalci: x₁ is a/the feces/excrement/dung/shit of x₂ (animal/person); (adjective:) x₁ is fecal (matter).
pinca: x₁ is a/the urine/piss/pee of x₂.
xaksu: x₁ (event) uses up/depletes/consumes/[wastes] x₂ [resource].
feskevlu'a: x₁ is a sewer carrying waste through x₂ that stretches from x₃ to x₄ and goes through points x₅ (set)
fesli'a: x₁=f₂=c₁ abandons / forsakes / leaves behind x₂=f₁=c₂
festerplakai: c₁ is intended to be disposed of after use; c₁ is disposable.
festerplatci: t₁ is a disposable tool/utensil/resource used for doing t₂; t₁ is intended to be thrown away after doing t₂.
fesybaktu: b₁ is a trash bin/trash can/recycle bin with contents b₂=f₁, made of material b₃.
fesygau: x₁=g₁ [person/agent] leaves waste product/wastes x₂=f₁ by event/activity x₃=f₂=g₂
fesyseigau: x₁ removes waste/trash x₂ from x₃.
temfesti: f₁ is a ruin that has decayed from time/event t₂ to time/event t₃
victerlu'i: v₂=l₃ is trash/rubbish/garbage/refuse removed from v₃=l₂ by v₁=l₁ (agent)