This author makes some remarks concerning a study by E. Rudnicka (2011), esp. the problem of the morphological structure of Latin absurdus ‘absurd’ vs. surdus ‘deaf ’ and the semantic proportion between ‘deaf ’ and ‘stupid’. The problem doubtless deserves a closer investigation, considering the fact that it occurs in some non-Slavonic languages, too, as well as that the semantic evolution has produced also some other meanings like Middle High German top ‘mad, rabid’ ~ English dumb, or, in non-IE languages: Tuvinian düley ‘deaf ’ ~ Tofalar düley ‘calm, quiet’ ~ Chagatay düley ‘stupid’ = Middle Turkic tülek ‘blind’