動詞 concert:

1. contrive (a plan) by mutual agreement
   同義詞：concert
2. settle by agreement
   同義詞：concert

形容詞 concerted:

1. involving the joint activity of two or more
   同義詞：combined, conjunct, conjunctive, cooperative, united

1. In spite of the difficulty of the passage, we succeeded in picking out its sense by our concerted efforts.
   這段文字雖然難懂，但是我們通過共同努力還是弄懂了它的含意。
2. A conscientious or concerted effort toward an end; an earnest attempt.
   努力，盡力為達(dá)到目標(biāo)而所做的盡職的、一致的努力; 熱切的嘗試
3. He woke his audience to the need for concerted action.
   他使聽眾意識到有必要采取一致的行動。
4. A vigorous concerted movement for a cause or against an abuse.
   圣戰(zhàn)贊成某一事業(yè)或反對某一弊病而進(jìn)行的有力的統(tǒng)一運(yùn)動

con.cert.ed

adj.（形容詞）
Planned or accomplished together; combined:
商定的：共同計劃或完成的；聯(lián)合的：
例句：
We made a concerted effort to solve the problem.
我們一起努力解決了這個問題

Music Arranged in parts for voices or instruments.
【音樂】 編成合奏曲的：按聲音與樂器分聲部的

【引伸】
concert.edly
adv.（副詞）