The whole village pulled together and repaired the canal.
Tips
usage
齐心 typically chains with 协力 ('pool effort') as the four-character set phrase 齐心协力 ('one heart, joined strength'), the standard slogan for teamwork. The bare 齐心 still works but the four-character version is far more common in writing.
memory
齐 means 'aligned / level / all-together'; 心 is 'heart.' So 齐心 = 'hearts aligned' - same image as the English 'on the same page,' but with hearts in a row instead of pages.
