impair
verb (used with object)
to make or cause to become worse; diminish in ability, value, excellence, etc.; weaken or damage.
Used to describe an ongoing action or state that is currently taking place in the immediate present.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“Her doctor said you have medical conditions that are impairing your heart, so when you are going to exert yourself, you need to take this medication to protect your heart, plain and simple,” Haggerty said.
From The Wall Street Journal ● Jun. 8, 2016