词根：-serv-
【词根含义】：服务;保持,留心
【词根来源】：“服务”的意义来源于拉丁语名词servus, servi, m(奴隶,佣人)和拉丁语动词servio, servire, servivi, servitus(服务);“保持,留心”的意义来源于拉丁语动词servo, servare, servavi, servatus(保持,留心)。
【同源单词】：conservation, conservative, conserve, deserve, preservation
前缀：pre-
【词根含义】：前,先
【词根来源】：来源于拉丁语prae。
【同源单词】：precaution, precede, precedent, preceding, precise
词根词缀：pre-, prae-
【来源及含义】Latin: before [both in time and place]
【相关描述】The prefix prae- can actually be substituted for pre- because both of them are different spellings for the same prefix meaning "before".
【相关词根词缀】 Related before-word units: ante-; antero-; anti-; pro-. Related "time" units: aevum, evum; archaeo-, archeo-; Calendars; chrono-; horo-; Quotes: Time; tempo-.
【同源单词】preacquaint, preacquaintance, preagonal, pre-agricultural, preamble, preambular
词根词缀：serv-, -serve
【来源及含义】Latin: servare, to watch, to keep safe, to protect, to maintain; to preserve
【相关描述】Don't confuse this serv-, -serve with another Latin serv- which means "servant" or "slave".
【同源单词】archaeological conservancy, Arte conservatus, astronomical observatory, behavioral observation audiometry, conservation, conservation