词根词缀：astro-, astr-

【来源及含义】Greek: star, stars, star shaped; also pertaining to outer space

【同源单词】apastron, archaeoastronomer, archaeoastronomy, astro-alchemist, astrobiology, astroblast

词根词缀：pass-, pace-

【来源及含义】Latin: step, stepping

【同源单词】apace, astrocompass, compass, compasses, electronic pacemaker, encompass