一いっ致ち協きょう力りょく

noun, noun or participle which takes 'suru'

concerted effort; solidarity; joining forces

Used when people or groups work together in agreement toward a common goal. Often appears in formal or organizational contexts.

• 問もん題だい解かい決けつには全ぜん員いんの一いっ致ち協きょう力りょくが必ひつ要ようだ。

  Solving the problem requires the concerted effort of everyone.

• 両りょう社しゃは一いっ致ち協きょう力りょくして新しん製せい品ひんを開かい発はつした。

  The two companies joined forces to develop a new product.