Abstract
The purpose of this paper is to examine the violations of the Rhythmic Law in the words with the suffix -ár related to the Ľubomír Kralčák’s inspiring paper On the Vocal Quantity Stability in the Slovak Suffix -ár (-áreň). I propose here a regressive rhythmic law according to which the Proto-Slovak roots of the AP (b) regularly shortened when followed by the suffix -ár. The proposed sound law operated in Proto-Slovak, before the definitive fixation of the stress on the initial syllable in Slovak and before the Slovak Rhythmic Law.