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词根词缀:ob-1

【来源及含义】Latin: toward, to, before

【相关描述】Before c, ob- becomes oc-; before f, ob- becomes of-; before g, ob- becomes og-; before p, ob- becomes op-; before m, ob- becomes o-

【同源单词】oblige, obsequious, obstetrics, obverse, obvert, offer