The artist's work explores conceptual ideas and challenges traditional notions of art.

Despite the concession made by the company, the workers were still unsatisfied with the new contract.

The concierge at the hotel was very helpful in recommending local attractions.

I am concerned with the environment.

The orange juice is too concentrated for my taste.

You can concatenate two strings using the + operator.

String concatenation is the process of combining two or more strings into a single string.

The mirror has a concave surface.

The concavity of the surface created a unique pattern.

He used clever concealment to hide the treasure.