This paper clarifies the dynamic mutual semantic effect between ``-to`` and ``kkazi`` appeared by a corpus of the 1st grade and the 6th grade diaries of Elementary. The ``-to`` and ``-kkazi`` have not only discriminal semantic features, but also common ones. The scope of semantic features of ``-to``, nevertheless, have generously broad wide to the extent of being implicated to ones of ``-kkazi``. As the result of them, the sentences of ``-to`` are seen very frequently in the 1st grade, but are rare in the 6th grade, and he ones of ``-kkazi``, vice versa. That is, the less frequency in use of ``-to``, the more one in use of ``-kkasi`` appears in the sentence according to go up the grade. The reason is why ``-to`` have common features except partial scopes of ``-kkazi`` and ``-kkazi`` is not still unspecified in the 1st grade in which attribute to replacement of ``-kkazi`` by ``-to``. But frequency in use of ``-kkazi`` in 6th grade are higher than one of the 1st grade according that the semantic feature of ``-kkazi`` are branched diversely and the peculiarities of precombined noun are increased by abstract one.