The absolutive case is a grammatical case that can represent both the subject and the object.

He struggled to understand the object.

The subject is the most important part of a sentence.

His absolute belief gave him the power to overcome difficulties.

He showed his gratitude on his face.

He has difficulty expressing his emotions in words.

He respects both opinions.

He is studying Japanese grammar.

This is my new case.

The purpose of this project is to develop a new product.