dilnu -dil- gismu

x1 is a cloud/mass of clouds of material x2 in air mass x3 at floor/base elevation x4.

See also carvi, tcima.

In notes:

x1 rains/showers/[precipitates] to x2 from x3; x1 is precipitation [not limited to 'rain'].
x1 is weather at place/region x2; (adjective:) x1 is meteorological.
x1 is a quantity of fluff of composition/structure/characterization/substance x2; x1 is fluffy/airy/soft/fuzzy in texture