偏屈

1. Origins, structure, and basic meaning

• Structure: 偏屈 (へんくつ) describes an eccentric or stubborn disposition. The examples distinguish appearance from an actual change.
• Basic usage: 偏屈に見える reports only an outward impression offset by kindness; 偏屈になった predicates growing stubborn with age.

2. Common pitfalls and similar expressions

• Appearing eccentric and becoming stubborn
  • 見える does not establish actual character, whereas なった asserts a change of state. Do not swap the two English senses without this contextual basis.