词根词缀：gon-, gonio-, -gon, -gonal, -gonally, -gony

【来源及含义】Greek: corner, bend, angle

【同源单词】agonic, decagon, diagon, diagonal, dodecagon, enneagon

词根词缀：tetra-, tetr-

【来源及含义】Greek: four; a number used as a prefix

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "four, fourth": quadri-; quatr-; tessara-.

【同源单词】rotundo-tetragonal, tessaraglot, tetrabasic, tetrablastic, tetrabrach, tetrabrachius