-Attwaɣ, yettaleɣ s yizwirin n “ttu”, “ttwa”, “tt”, “mm”,” nn”i talɣa taḥerfit. Attwaɣ yeskanay-d belli tigawt tettrusu-d ɣef umigaw. Md : Ttu (talɣa tamezwarut ) →ttwattuɣ (talɣa tattwaɣt).