primitive and barbarous; uncivilized and barbaric
Describes a state of being both uncivilized and cruel; often used in historical or anthropological contexts. Can also be used figuratively to criticize behavior as savage.
The tribe led a primitive and barbarous life.
His behavior was uncivilized and barbaric, and unforgivable.
Means 'primitive' or 'uncivilized' without the connotation of cruelty or savagery that 野蛮 adds.
Means 'barbaric' or 'savage'; 未開野蛮 combines both concepts for emphasis.
Compound of 未開 (primitive, uncivilized) and 野蛮 (barbaric, savage). The exact historical derivation is uncertain, but the combination intensifies the meaning of both components.