non-gradable
adjective/ˌnɒn ˈɡreɪdəbl/
/ˌnɑːn ˈɡreɪdəbl/
(grammar)- (of an adjective) that cannot be used in the comparative and superlative forms, or be used with words like ‘very’ and ‘less’
非级差的；不与程度副词连用的 Oxford Collocations DictionaryNon-gradable is used with these nouns:- adjective