This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Causing a loss of energy or strength.

v. Present participle of debilitate.

adj. causing weakness. Opposite of invigorating.

adj. impairing the strength and vitality

"It was clear that most South Africans refused to be drawn into what he labelled debilitating action against the government they elected themselves."

enervating    weakening    enfeebling    debilitative    draining    exhausting   

debilitate   

facilitating    rehabilitating