caedes

Caedes, caedis is a third declension feminine i-stem, from caedo, "to cut down, strike". It covers battlefield slaughter and a single murder with the same word - Latin has no everyday equivalent of "homicide" - and can also mean the blood shed or the victims themselves.

Two traps. The nominative singular and the nominative and accusative plural are all caedes, so the verb has to tell you the number. And caedo (long e in the perfect, cecidi) is not cado, "to fall" (cecidi with a short e); the compounds inherit the collision, which is why occido means "to kill" and occido means "to fall, to set". English takes -cide from it in homicide, suicide and regicide, plus incision, concise, chisel and, oddly, scissors.