WordþrettándiMeaningthirteenthPart of speechnumeralPronunciationCourseIcelandicLessonOrdinal numbers 11th to 31st (ellefti, tólfti...)Usages of þrettándiViðtalið er þrettánda eða fjórtánda apríl.The interview is on the thirteenth or fourteenth of April.Dómarinn vann ellefta, tólfta og þrettánda júní.The judge worked on the eleventh, twelfth, and thirteenth of June.