irregular

ir·reg·u·lar

adj \(ˈ)ir-ˈ(r)eg-yə-lər\

Definition of IRREGULAR

1

: lacking perfect symmetry of form : not straight, smooth, even, or regular <irregular teeth>

2

a : lacking continuity or regularity of occurrence, activity, or function <irregular breathing> b of a physiological function : failing to occur at regular or normal intervals <irregular menstruation> <have your bowels been irregular> c of an individual : failing to defecate at regular or normal intervals <was constipated and very irregular>

—ir·reg·u·lar·ly adverb