左利き

1. Origins, structure, and basic meaning

• Structure: 左利き (ひだりきき) is a noun for a left-handed person or the trait of being left-handed.
• Basic usage: 弟は左利きだ predicates the trait; 左利きの打者 uses の to modify a batter.

2. Common pitfalls and similar expressions

• Nominal predicate and の modifier
  • The form acts as a noun before だ, but it needs の when directly describing another person noun.