Middle-of-the-road and Unchallenging

Middle-of-the-road adjective - Avoiding major social change or extreme political ideas.

Unchallenging and middle-of-the-road are semantically related. In some cases you can use "Unchallenging" instead an adjective phrase "Middle-of-the-road".

Middle-of-the-road and unchallenging are semantically related. Sometimes you can use "Middle-of-the-road" instead an adjective "Unchallenging".