What is 'ater' in English?

Answer 1

Dull black is the English equivalent of 'ater'. The feminine and neuter forms of the masculine gender adjective are 'atra' and 'atrum', respectively. But whatever the form, the Latin adjective refers to 'dark, dead, dull' black. The adjective 'Niger' is the word of choice in regard to 'glossy, shining' black.