Neanderthalian
/nɪˌandəˈtɑːlɪən/adjective
= Neanderthal.
noun
= Neanderthal.
Origin
1920s; earliest use found in H. G. Wells (1866–1946), novelist and social commentator. From Neanderthal + -ian, perhaps after French néanderthalien, néandertalien, adjective.