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词根:acm = top (顶端)

acme n. 顶峰

词根:cmul = heap (堆积)

accumulate v. 积累

cumulus n. 积云

词根词缀:acme, -acmic

【来源及含义】Greek: highest point; prime, best time

【同源单词】acmastic, acmatic, acme, acmesthesia, acmic, acmite