YOU SAID:

my sister has a gyatt

INTO JAPANESE

私の妹はギャットを持っています

BACK INTO ENGLISH

my sister has gat

INTO JAPANESE

私の妹はガットを持っています

BACK INTO ENGLISH

my sister has a gut

INTO JAPANESE

私の妹は根性がある

BACK INTO ENGLISH

my sister has guts

INTO JAPANESE

私の姉は根性がある

BACK INTO ENGLISH

my sister has guts