1. Ah Kuhn (thank you)
2. Ah Kuhn Jaran (thank you very much)
3. Ah Kuhn Tom Tom (big big thank you)
But today I was in a deaf establishment, so I said thank you with ASL (American Sign Language). Turns out, you sign it differently in Khmer! In ASL to say thank you have a flat hand, palm facing you body, fingertips touching your mouth. Then you lower the hand so it's pointing out. In Khmer Sign Language you have your hands in prayer by your face. Then you release the right hand to draw a circle with it (an outward twist of the wrist) and then bring the hands back to prayer!