幸運

1. Origins, structure, and basic meaning

• Structure: The noun and adjectival noun 幸運 (こううん) denotes good luck or favorable fortune.
• Basic usage: An outcome may be 幸運だった, while sentence-initial 幸運にも introduces a fortunately favorable event.

2. Common pitfalls and similar expressions

• Distinguishing 幸せ
  • 幸運 centers on favorable chance or an outcome, while 幸せ centers on a state of happiness; they are not automatically interchangeable.