涼しい

1. Origins, structure, and basic meaning

• Structure: The spelling is 涼しい, read すずしい, and it is an i-adjective meaning pleasantly cool rather than hot.
• Basic usage: 涼しい describes wind, air, or a time of day as cool and comfortable.

2. Common pitfalls and similar expressions

• A cool breeze entering and a period before the day grows hot
  • Both examples use the form 涼しい. The first describes the quality of wind coming through a window; the second makes the still-cool period a condition for beginning field work.
• A breeze through the window and the time to start field work
  • 涼しい風が窓から入ってきました。 — A cool breeze came through the window.
  • 暑い日は涼しいうちに畑の作業を始めます。 — On hot days, we begin working in the field while it is still cool.