词根词缀：ambul-, ambulat-, -ambulate, -ambulating, -ambulation -ambulator, -ambulatory, -ambulant, -ambulic, -ambulism, -ambulist

【来源及含义】Latin: to walk, take steps, move around; from "to wander, to go astray"

【同源单词】amble, amble, ambulacrum, ambulance, ambulant, ambulate

词根词缀：pesti-, pest-

【来源及含义】Latin: plague, contagion

【同源单词】nonpersistent pesticide, persistent pesticide, pest, pest resurgence, pesthouse, pesticemia

词根词缀：plag-, plagu-, plague-

【来源及含义】Greek > Latin: strike, stroke, blow, wound; beat the chest; lament loudly [while beating the chest]; pestilence

【同源单词】black plague, bubonic plague, pestis minor, plague, plague, plagueful