* Monk: This is the most likely meaning. A monk is a member of a religious community who lives a secluded life, often in a monastery, dedicated to prayer, study, and work.
* Monarch: This word refers to a sovereign ruler, such as a king, queen, or emperor.
* Monachism: This is the practice of living a monastic life, characterized by solitude, prayer, and renunciation of worldly possessions.
If you could provide more context about where you encountered the word "monach," I might be able to give you a more specific answer.