panci -pan-panc- gismu

x₁ is an odor/fragrance/scent/smell emitted by x₂ and detected by observer/sensor x₃.

[an undetected emitter is odorless to the observer]; (cf. nazbi, sumne, cpina)

In notes:

cpina: x₁ is pungent/piquant/peppery/spicy/irritating to sense x₂.
malpanci: x₁ is a foul odor/stink emitted by x₂ and detected by observer/sensor x₃
nazbi: x₁ is the nose [body-part] of x₂ with nostril(s)/nasal passage(s) x₃; [metaphor: protrusion].
pancau: x₁ is odorless to observer x₂
panrkolone: x₁ is cologne with scent x₂
panselcigla: x₁ is musk produced from the gland x₂ of creature x₃
sliri: x₁ is a quantity of/contains/is made of sulfur/brimstone (S); [metaphor: foul odor, volcanic].
sumne: x₁ (experiencer) smells/scents (transitive verb) x₂; x₂ smells/has odor/scent to observer x₁.