1. in a manner that becomes progressively smaller, fewer, or less in amount, intensity, or degree

Examples

• The noise from the traffic grew decreasingly loud as we drove away from the city.
• Her interest in the project became decreasingly evident over the following weeks.
• The medication's effectiveness was decreasingly noticeable after the first month of treatment.
• Support for the proposal was decreasingly strong among the committee members.
• The temperature dropped decreasingly throughout the evening.