十分

1. Origins, structure, and basic meaning

• Structure: 十分 is read as じゅうぶん and is a na-adjectival and adverbial expression meaning enough or sufficient in amount or degree.
• Basic usage: Having enough preparation time appears in 時間は十分ある, while listening to an explanation fully appears in 説明を十分に聞く.

2. Common pitfalls and similar expressions

• Predicate and adverbial forms
  • Use 十分だ as a predicate and 十分に to modify the degree of an action.
• Difference from ten minutes
  • The same spelling 十分 is read じゅうぶん for “enough,” but じゅっぷん or じっぷん for ten minutes.