Drawn-out and Laborious

Drawn-out adjective - Relatively long in duration; tediously protracted.

Laborious and drawn-out are semantically related. In some cases you can use "Laborious" instead an adjective phrase "Drawn-out".

Laborious adjective - Involved in often constant activity.

Drawn-out and laborious are semantically related. Sometimes you can use "Drawn-out" instead an adjective "Laborious".