Humdrum and Unoriginal

Humdrum adjective - Causing weariness, restlessness, or lack of interest.

Unoriginal and humdrum are semantically related. In some cases you can use "Unoriginal" instead an adjective "Humdrum".

Unoriginal adjective - Using or marked by the use of something else as a basis or model.

Humdrum and unoriginal are semantically related. Sometimes you can use "Humdrum" instead an adjective "Unoriginal".