Remember what happened to Andy when he used "obtuse" to the warden?
Andy Dufresne: How can you be so obtuse?
Warden Samuel Norton: What? What did you call me?
Andy Dufresne: Obtuse. Is it deliberate?
Warden Samuel Norton: Son, you're forgetting yourself.
Andy Dufresne: The country club will have his old time cards. Records, W-2s with his name on them. Sir, if I ever get out, I'd never mention what happens here. I'd be just as indictable as you for laundering that money.
[Norton slaps the table]
Warden Samuel Norton: Don't you ever mention money to me again, you sorry son of a bitch! Not in this office, not anywhere!