kijno -kij- gismu

x1 is a quantity of/contains/is made of oxygen (O); [metaphor: supporting life/combustion].

See also jelca, vacri, vasxu.


In notes:

jelca
x1 burns/[ignites/is flammable/inflammable] at temperature x2 in atmosphere x3.
vacri
x1 is a quantity of air/normally-gaseous atmosphere of planet x2, of composition including x3.
vasxu
x1 breathes/respires x2 [gas].