词根词缀：ob-5

【来源及含义】Latin: completely, totally

【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】observe, obsess, obsolete, obsoletely, obsoleteness, occupy

词根词缀：obsolesc-, obsolescent-, obsolet-

【来源及含义】Latin: to wear out, to grow old; to fall into disuse; to grow out of use; elderly, older

【相关词根词缀】 Related "old; old age, elder" units: gero-; presbyo-; sen-; veter-.

【同源单词】obsolesce, obsolesced, obsolescence, obsolescent, obsolescently, obsolescing