词根：pachy = thick （厚）

pachyderm 厚皮动物；脸皮厚的人

词根词缀：brachyo-, brachy-, -brachy, -brach

【来源及含义】Greek: short, shortness, small [also expressed as "slow"]

【相关描述】Used in the sense of "abnormally small, short".

【同源单词】amphibrach, brachycardia, brachycephalic, brachycephalous, brachycephaly, brachydactyl

词根词缀：-mach, -machy, -machies, -machia, -machist, -machic, -machical

【来源及含义】Greek: battle, war; fight; contest

【相关词根词缀】 Related "war, war-like" or "battle" word units: areo-; belli-; milit-.

【同源单词】alectryomachy, andromachy, angelmachy, arctomachy, batrachoherpetomachia, batrachoherpetomachy

词根词缀：pachy-, pacho-, pach-

【来源及含义】Greek: thick, dense; large, massive

【相关描述】This element is used in the formation of botanical, zoological, and pathological or medical terms.

【同源单词】acropachy, acropachyderma, blepharopachynsis, isopach, isopachous, isopachy

词根词缀：tacho-, tach-, tachy-

【来源及含义】Greek: fast, speed, swift, rapid

【同源单词】acestachy, acrotach, auxetachy, bradypnea, cardiotachy, hemotachometer

词根词缀：trachy-, trach-

【来源及含义】Greek: rough

【同源单词】trachoma, trachomatous, trachycarpous, trachychromatic, trachyphonia, trachyspermous