可能

1. Origins, structure, and basic meaning

• Structure: 可能 is a noun and adjectival expression indicating that something can be realized and is read かのう.
• Basic usage: A noun appears in 再入場が可能だ, while an action is nominalized in 運ぶことが可能だ; both use the が可能だ pattern.

2. Common pitfalls and similar expressions

• Noun and action
  • A noun such as reentry takes が可能, while a verb action uses its dictionary form followed by ことが可能.
• Difference from できる
  • できる expresses ability or possibility concisely in everyday speech, while 可能だ presents availability somewhat more formally in notices or explanations.