Stems which are bound morphemes cannot be used without ending. We can find the examples that stems were used without endings in the ‘Gyerimyusa’ written in the 12th century, but in the Korean materials written since then up to the modern times we can't discover the example that stem was used independently. By the way since 2000, the examples that stems divorced from endings were used in the recent broadcastings and journal articles appeared considerably. In this paper I checked such examples and tried to establish the cause of the phenomena. As a result I made a conclusion that the phenomena such as ‘bureop(부럽), deoreop(더럽), eonjjanh(언짢),’ that a stem of a simplex was used apart from ending happened because of clarity of stem and development of wordplay. And I thought ‘ppaebak(빼박), deudbo (듣보)’ are the examples that stems are separate in abbreviation, ‘meoktwi(먹튀), kkojip(꼬집), meokyojeong(먹요정)’ are the cases that stems are separate in the formation of stem-compound, ‘meokstagraem(먹스타그램)’ is the example that stem is separate in the formation of blend. The phenomena that a stem of a simplex was used independently or the exmples that stems are separate in abbreviation didn’t exist in the Korean before 2000. I hope that many studies on the charateristics of stem will be made on the basis of the materials in this paper.