vacri -var- gismu

x₁ is a quantity of air/normally-gaseous atmosphere of planet x₂, of composition including x₃.

In notes:

gapci: x₁ is gaseous/fumes/a gas/vapor of material/composition including x₂, under conditions x₃.
kijno: x₁ is a quantity of/contains/is made of oxygen (O); [metaphor: supporting life/combustion].
trano: x₁ is a quantity of/contains/is made of nitrogen/ammonia/nitrates.
tumla: x₁ is a parcel/expanse of land at location x₂; x₁ is terrain.
vasxu: x₁ breathes/respires x₂ [gas].
xamsi: x₁ is a sea/ocean/gulf/[atmosphere] of planet x₂, of fluid x₃; (adjective:) x₁ is marine.
bifca'e: c₁=b₂ (agent) blows c₂.
varbasygau: x₁=g₁ ventilates fresh air x₂=b₁ for stale air x₃=b₂ in circumstances x₄=b₃
varmuvgau: mg₁ is a fan blowing/moving air mg₂=v₁ to/towards/onto mg₃ from mg₄.
varsoi: s₁ is an airman in army/air force s₂
varterjabre: x₁ is an air brake (control surface) of vehicle x₂ in atmosphere x₃; x₁ slows the motion of vehicle x₂ by increasing drag in atmosphere x₃.
varxamsi: x₁ is the atmosphere of planet x₂=v₂ (default Earth) of composition v₃.
varxasyske: s₁ is the atmospheric science of planet x2.
lu'ei (exp!): convert a grammatical quotation to a tanru unit; x₁ expresses/says the quoted text for audience x₂ via expressive medium x₃.