词根词缀：-ative

【来源及含义】Latin: a suffix; tending to

【同源单词】acceleratory, accumulative, agglomerative, agglutinative, agitative, alterative

词根词缀：cumulo-, cumul-, cumuli-

【来源及含义】Latin: a heap, heap up; gather together, bunch together, cram, amass, compile; pile up

【同源单词】accumulate, accumulation, accumulative, accumulatively, accumulativeness, altocumulus