1. in a way that has an extremely unpleasant or offensive smell
Usage: formal
2. in a way that is harmful or unwholesome
Usage: formal; literary

Examples

• The garbage had been sitting noisomely in the heat for days.
• The swamp water smelled noisomely of decay and rot.
• The old fish market reeked noisomely in the summer sun.
• Sewage flowed noisomely through the broken pipes.
• The influence of corruption spread noisomely through the organization.
• The abandoned building stood noisomely deteriorating in the neighborhood.