1. the quality or state of requiring much time, effort, or hard work; the condition of being laborious
Usage: abstract noun; formal register

Examples

• The laboriousness of the research project required months of careful investigation.
• She appreciated the laboriousness of the craftsman's work on the wooden sculpture.
• The laboriousness of learning a new language can be discouraging at first.
• Despite the laboriousness of the task, the team completed it ahead of schedule.
• The laboriousness of historical document restoration demands patience and expertise.