词根词缀：sen-, sene-, seni-, sir-

【来源及含义】Latin: old age, old, elder, elderly

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

【同源单词】insenescence, insenescent, premature senility, psychosis of senility, seignior, seigniorage

词根词缀：-tude

【来源及含义】Latin: a suffix; state, quality, condition of

【同源单词】acritude, altitude, altitude, amplitude, amplitude modulation, aptitude