He thinks that war is a necessary evil.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

His speech has persuasiveness.

The extent of his vocabulary strength indicates that he is an avid reader.

His ability to concentrate is astonishing.

Her strong gaze gave a strong impression even before she spoke.

This tin toy is old, but it's still beautiful.

His ability to judge is very excellent.