fade-out

n (cinema or broadcasting 电影或广播) gradual weakening (of sounds, pictures, etc) （声音、 画面等）逐渐模糊不清, 渐隐, 渐淡, 淡出.

factious, factitious, factor, factorable, factorial, factorization, factorisation, factorize, factorise, factory, factory farm, factory ship, factotum, factual, factually, faculty, fad, faddiness, faddish, faddy, fade, fade-in, faded, faecal (US fecal), faeces (US feces), fag, fag-end, faggot (US fagot), fah, Fahrenheit, faience, fail, fail in, fail to, fail-safe, failing, failure, faint, faint-hearted, faint-heartedly, faint-heartedness, fainthearted,