親密

1. Origins, structure, and basic meaning

• Structure: The adjectival noun 親密 (しんみつ) describes a close relationship marked by familiarity and understanding.
• Basic usage: Becoming close is 親密になる, while an existing bond is 親密な間柄.

2. Common pitfalls and similar expressions

• Becoming and being close
  • It means emotional or social closeness and does not imply that all boundaries or courtesy disappear.