He is thought to be a very unsociable person.

This design has a unique charm because it is asymmetrical.

His plan was so unrealistic that no one could believe it.

That plan is too impractical, it's difficult to implement.

I'm troubled by his unproductive attitude.

She has a beautiful singing voice.

She loves songs and is always singing.

She tried to understand the meaning of the song while reading the lyric card of the new album.

Syllabic characters are an important tool for expressing words.

He was a very excellent student before he turned to delinquency.