The term 'most insignificant' can be described by four different words, all of which have nine letters or fewer. The first is 'teensiest, ' which means the smallest or LEAST important. The second is 'LEAST, ' which means the lowest in amount, degree, or importance. The third is 'MEREST, ' which means the slightest or most insignificant. Finally, the fourth is 'puniest, ' which means the weakest or most insignificant. All of these words describe something that is of little or no importance.