词根词缀:echo-, ech-
【来源及含义】Greek: sound, noise; especially a returned sound; repetition, imitation
【同源单词】anecho, anechoic, catecheses, catechesis, catechetical, catechism
词根词缀:photo-, phot-, -photic
【来源及含义】Greek: light; ultraviolet and infrared radiation; radiant energy
【相关词根词缀】 Etymologically related "light, shine, glow" word families: ethero-; fulg-; luco-; lumen-, lum-; luna, luni-; lustr-; phengo-; pheno-; phospho-; scinti-, scintill-; splendo-.
【同源单词】aphotesthesia, aphotic, aphototaxis, aphototropism, astrophotograph, astrophotographer