My terminally ill character, in huge amounts of pain, is in an elevator. The elevator stops to let someone else on, and he says "ugh" - a throaty grunt of irritation loud enough for the other person to hear. I can't really describe this well (I don't think "a loud, throaty grunt of irritation" quite does it) and I don't want to use the word "ugh" as dialogue. Can anyone suggest a way of describing this? If it is unclear the sound I am trying to describe, I can record it myself and attach the recording.