adv. 25B6; adverb
irregularly hexagonal : ASYMMETRICALLY, unevenly.
his heart was beating irregularly : ERRATICALLY, intermittently, in/by fits and starts, fitfully, patchily, haphazardly, unsystematically, unmethodically, inconsistently, unsteadily, unevenly, variably, spasmodically, discontinuously, inconstantly.