This study presents an analysis of laryngeal cooccurrence restrictions within an Optimality Theory framework. The languages examined here include uechua, Aymara, Basque, Sanskrit, Ofo, Gojri, Old Georgian, Hausa, Tzutujil, and Shuswap. In each of these languages, particular segments are prohibited from cooccurring within the morpheme or word. The book will be of interest to phonologists concerned with word- or morpheme-level cooccurrence restrictions, the Obligatory Contour Principle, or Optimality Theory.