词根词缀：apt-, ept-

【来源及含义】Latin: fit, fitted, suited, suitable, appropriate; join, fasten

【同源单词】adapt, adapt, adaptability, adaptable, adaptableness, adaptably

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