full of/surrounded by rain clouds
Latin word, found 18 times in the texts on Socratos.
Vergil, Aeneid 1.535: cum subito adsurgens fluctu nimbosus Orion
Ovid, Metamorphoses 11.551: Frangitur incursu nimbosi turbinis arbor,
Ovid, Tristia 1.11.13: saepe ego nimbosis dubius iactabar ab Haedis,
All forms of nimbosus