ferus -a -um

1. 1

   wild, savage, fierce, cruel

   = trux= ferōx= atrōx= violēns= immānis= efferus= crūdēlis= silvāticus= ācer= acerbus= sevērus ↔ mītis↔ tranquillus↔ misericors↔ placidus↔ quietus↔ clemens

2. 2

   uncivilized, uncultivated

   = barbaricus

3. 3

   untamed, rough