YOU SAID:

i dont understand what this is

INTO JAPANESE

私はこれが何であるか理解していません

BACK INTO ENGLISH

I do not understand what this is

INTO JAPANESE

私はこれが何であるか分からない

BACK INTO ENGLISH

I do not know what this is

INTO JAPANESE

私はこれが何かわからない

BACK INTO ENGLISH

I don't know what this is

INTO JAPANESE

理解できんのだ

BACK INTO ENGLISH

I don't know what this is.

INTO JAPANESE

理解できんのだ

BACK INTO ENGLISH

I don't know what this is.