尊大

1. Origins, structure, and basic meaning

• Structure: 尊大 (そんだい) describes haughtiness that elevates oneself over others. 尊大な modifies a noun; 尊大にならず negates a change of state.
• Basic usage: Others distance themselves from 尊大な態度; a speaker resolves not to become arrogant after success.

2. Common pitfalls and similar expressions

• Arrogance observed by others and change the speaker avoids
  • The attributive form evaluates an existing attitude; にならず concerns avoiding a future disposition. Unlike confidence, the word negatively implies looking down on others.