腹

1. Origins, structure, and basic meaning

• Structure: 腹(はら) means the belly and can figuratively refer to inner feelings.
• Basic usage: It appears when expressing hunger or speaking openly with someone.

2. Common pitfalls and similar expressions

• The meaning of the whole expression
  • 腹が減る means to feel hungry.
  • 腹を割って話す is an idiom for speaking frankly without hiding one's true feelings.