blackens怎么读？

He blackens his opponents by giving them names.他用起各种外号来诽谤他的对手.Soot makes smoke dark and blackens walls.烟灰使得烟成黑色,并熏黑了墙壁.Dahlia: Fire doesn't cleanse, it blackens!达丽雅: 火不能净化, 只能玷污....

v.（使）变黑，把…弄黑( blacken的第三人称单数 )，发暗，败坏（名誉等），诋毁...