celxa'i lujvo

xa1=c1 is a gun/cannon/firearm for use against xa2 by xa3, launching projectile c2 propelled by c3.

jvajvo; Gismu deep structure is "cecla gi'e xarci".

In notes:

xarci
x1 is a weapon/arms for use against x2 by x3.
se'irjvedatcatra
x1 commits murder-suicide, killing themself and x2 via means/method x3
elxa
x1 is a gun for use by x2 against x3, launching material x4