What does it mean to undermine something?

To undermine something means to weaken or damage it gradually and often in a hidden or discreet manner. This term often implies that the action occurs subtly, making it difficult for others to perceive the harm being done until significant damage has been inflicted. By choosing the definition of injuring or destroying underhandedly, it captures the essence of how undermining works—it typically involves covert actions intended to cause harm without direct confrontation or open conflict.

The other options imply positive actions—supporting, strengthening, or enhancing—which contrast sharply with the concept of undermining. These alternatives suggest improvement or aid, while undermining fundamentally relates to sabotage or erosion of strength, thereby reinforcing why the selected answer is the most accurate choice.