1) The stagnantness of the pond was evident by the layer of green algae on the surface.

2) Trying to move forward in this job felt impossible due to the stagnantness of the company.

3) The lack of innovation in the industry led to a sense of stagnantness among employees.

4) The stagnantness of the conversation made it difficult to continue.

5) The stagnantness of the economy created hardship for many small businesses.

6) A feeling of stagnantness settled over the town after the factory shut down.

7) The stagnantness of the air in the room made it feel stuffy and uncomfortable.

8) The stagnantness of the market made it difficult for new businesses to enter.

9) The stagnantness of the relationship became too much to bear for both parties.

10) The stagnantness of the project was frustrating for everyone involved.