失礼

1. Origins, structure, and basic meaning

• Structure: The noun and adjectival noun 失礼 (しつれい) denotes discourtesy or conduct that violates social politeness.
• Basic usage: An action may be 失礼だ, while a noun is modified with な, as in 失礼な言い方.

2. Common pitfalls and similar expressions

• Discourtesy in conduct and wording
  • It identifies a breach of courtesy and can also acknowledge one's own rudeness in an apology.