词根词缀：necessar-, necess-

【来源及含义】Latin: needed, inevitable, unavoidable, indispensable

【同源单词】In necessariis unitas, necessarily, necessary, necessitate, necessitous, necessitously

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