Humdrum and Laborious

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

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

Laborious adjective - Involved in often constant activity.

Humdrum and laborious are semantically related. Sometimes you can use "Humdrum" instead an adjective "Laborious".