词根词缀：liber-

【来源及含义】Latin: free

【同源单词】Alenda lux ubi orta libertas, deliver, deliverance, deliverer, delivery, Ense petit placidam sub libertate quietam

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