词根词缀：grav-, griev-

【来源及含义】Latin: heavy, weighty

【同源单词】aggravate, aggravated, aggravation, aggrieve, aggrieved, aggrievedness

词根词缀：seri-, serio-

【来源及含义】Latin: weighty, important, grave [from French sérieux (feminine sériuse), from Late Latin seriosus, from earlier Latin serius]

【同源单词】jocoserious, overserious, seriocomic, serious, seriously, seriousness