na-adjective, noun which may take the genitive case particle 'no', noun
good condition; going well; smooth
Describes a favorable state or progress, often used for health, machinery, or the flow of events. Common in phrases like 快調に進む (progress smoothly) and 体調が快調だ (be in good shape).
エンジンの調子は快調です。
The engine is running smoothly.
仕事は快調に
Work is progressing well.