词根：-sid-, -sess-, -sed-

【词根含义】：坐

【词根来源】：来源于拉丁语动词sedeo, sedere, sedi, sessus(坐)和sido, sidere, sidi, -(坐)。可追溯至原始印欧语sed-。

【同源单词】：preside, president, presidential, reside, residence

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：sed-, sedat-, -sid, -sess

【来源及含义】Latin: sit, sitting

【同源单词】assess, assessable, assessment, assessor, assessorial, assiduity