Enervating

I love the song of the mockingbird, the bird of four hundred voices. I love the color of jade, and the enervating perfume of flowers, but most of all, I love my brother, Man.

Source: tatoeba (5277702)

No enervating arts refined To slumber lull'd his heaven-born might; No weak indulgence warp'd thy mind, To cloud a hero's path of light.

Source: wiktionary

I rose by candle-light, and consumed, in the intensest application, the hours which every other individual of our party wasted in enervating slumbers, from the hesternal dissipation or debauch.

Source: wiktionary

Turning back, then, toward the basement staircase, she began to grope her way through blinding darkness, but had taken only a few uncertain steps when, of a sudden, she stopped short and for a little stood like a stricken thing, quite motionless save that she quaked to her very marrow in the grasp of a great and enervating fear.

Source: wiktionary