前缀：twi- 表示“二, 两”

twilight 黎明，黄昏（twi+light光→黑白光交替）

twiformed 有两种形式的（twi+form形状＋ed）

前缀：twi- 二、两

twifortned 有二形的

twilight 黎明，黄昏，曙暮光

twifold 两倍，双重

twiblade 双叶兰

twiforked 有两叉的

词根词缀：crepuscu-, crepusc-

【来源及含义】Latin: twilight, dusky, dawn; in the evening or early-morning hours; dim, indistinct

【同源单词】anticrepuscular arch, anticrepuscular ray, crepuscle, crepuscular, crepuscule, crepusculine

词根词缀：lygo-, lyg-

【来源及含义】Greek: shadow, shadowy; shade, darkness; twilight; gloomy

【相关词根词缀】Other related "dark; shadow, shade; black" units: melan-; nigri-; nocti-; nycti-; scoto-; skio-; umbra-.

【同源单词】lygomania, lygophil, lygophile, lygophobia

词根词缀：phaeo-, pheo-

【来源及含义】Greek: dusky; literally, having the color of the twilight sky

【同源单词】pheochrome, pheochromoblast, pheochromocytoma, pheomelanin, pheomelanosome, pheophorbide