You need to use your head to solve this problem.

I am trying to understand classical literature using a classical Japanese dictionary.

I bought a new Japanese-Japanese dictionary.

My Chinese-Japanese character dictionary is very useful for learning Japanese.

I am interested in Japanese language education.

He used a thesaurus to find suitable words for writing his essay.

He lost everything.

She is planning a date with her current boyfriend.

My boyfriend gave me a gift.

Everyone was surprised by the news.