General opposites:
* Lazy: This is the most common and straightforward opposite. It implies a lack of motivation and effort.
* Slothful: Similar to lazy, but with a stronger connotation of inactivity and sluggishness.
* Idleness: This refers to a state of doing nothing, often in a passive way.
* Lethargic: This suggests a lack of energy and enthusiasm, making it difficult to be productive.
* Indolent: Similar to lethargic, but with a stronger sense of unwillingness to exert oneself.
Contextual opposites:
* Inefficient: If you're talking about industriousness in a work context, this could be an opposite.
* Unproductive: Similar to inefficient, but focuses on the lack of output.
* Unmotivated: If you're talking about industriousness in a personal context, this could be an opposite.
The best opposite will depend on the specific situation you're describing.