His swordsmanship can be called true unparalleled.

This beautiful twin crystal is one of the wonders of nature.

This two-way communication system can send and receive data.

Let's roll the dice and decide the next action.

This is part of my collection, and I particularly like the dipyramid.

He is always hanging out with bad friends. Truly, birds of a feather flock together.

The passive form in Japanese is used differently from English.

This quadrilateral is a square.

By learning the imperfective form, you can understand Japanese grammar more deeply.

Please tell me the singular form of this word.