Which word best describes something that is 'enervating'?

The term 'enervating' is used to describe something that causes a loss of energy or strength, leading to a sense of weakness or fatigue. Therefore, the choice that accurately reflects this meaning is one that indicates a reduction in energy or vigor.

When something is enervating, it drains one’s energy rather than revitalizing or energizing them. Words like 'causing debilitation' capture the essence of this loss of energy by suggesting a weakening or debilitating effect on an individual. This aligns perfectly with the definition of 'enervating'.

The other options provide contrasting meanings. For instance, 'invigorating' and 'restoring vigor' suggest an increase or restoration of energy, which directly opposes the meaning of 'enervating'. The phrase 'culling energy' is also misleading, as it implies a selective removal rather than a comprehensive depletion or weakening effect, further differentiating it from the intended meaning.