都合

1. Origins, structure, and basic meaning

• Structure: 都合 (つごう) is an established two-kanji word for circumstances, convenience, or whether conditions fit.
• Basic usage: 都合 can refer to whether conditions or timing work out, or to circumstances convenient for someone.

2. Common pitfalls and similar expressions

• Convenience and circumstances
  • The predicate after 都合が and the reason framed by 都合で determine the specific sense.