How do you say promise in twi?

In Twi, a language spoken in Ghana, the Word for "promise" is "kɔm". The letter "ɔ" is pronounced like the "aw" in "saw". The "k" is pronounced as a hard "k" sound, like in the Word "kite". The "m" at the end is pronounced as a nasal sound, similar to the "m" in the Word "thumb".