Latin
Adjective
sīmum
-  nominative neuter singular of sīmus
-  accusative masculine singular of sīmus
-  accusative neuter singular of sīmus
-  vocative neuter singular of sīmus
References
 
Portuguese
Etymology
From French simoun (“simoom”), from Arabic سَمُوم (samūm, “hot wind”), from سَمَّ (samma, “to poison”).
Pronunciation
Noun
simum m (plural simuns)
-  simoom (hot and dry wind)