词根词缀：sec-, seg-, -sect, -section, -sectional
【来源及含义】Latin: to cut
【相关词根词缀】 Related cutting-word units: cast-; castrat-; -cise, -cide; -ectomy; mutil-; put-; temno-; -tomy; trunc-.
【同源单词】acusection, acusector, antivisectionist, antivivisection, antivivisectionism, antivivisectionist
词根词缀：tri-, tre-
【来源及含义】Greek > Latin: a numerical prefix meaning, three, thrice, threefold; triple; a word element for number 3
【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terce-; terti-; trigono-; trito-.