WordtridesetMeaningthirtyPart of speechnumeralPronunciationCourseCroatianLessonCounting by tens to 100 (trideset, četrdeset...)Usages of tridesetKnjiga košta trideset, a rječnik četrdeset.The book costs thirty, and the dictionary forty.Trebam trideset ili četrdeset komada.I need thirty or forty pieces.