着工

1. Origins, structure, and basic meaning

• Structure: In 着工 (ちゃっこう), commencement 着 and construction 工 combine to denote breaking ground.
• Basic usage: 着工 is the point at which actual construction begins after planning or approval.

2. Common pitfalls and similar expressions

• Start of construction
  • 着工前 marks a preparatory time before work starts, while 着工する expresses commencement.