I had to un-friend him on social media because he was constantly posting offensive content.

I decided to un-friend him on social media.

The un-understandableness of his explanation left everyone confused.

The un-understandability of his explanation left everyone confused.

She behaved in an un-auntly manner towards her niece.

The UN Security Council is responsible for maintaining international peace and security.

I love playing vingt-et-un with my friends.

Her behavior is un-Muslim-like.

The book was un-put-downable, I couldn't stop reading it.

He thought the new band was un-rock and roll.