moody - Having moods that change often, resulting in often being unhappy or unfriendly
mortality - The state of being human and not living for ever
mutiny - An act of refusing to obey the orders of a person in authority.
motivated - Very enthusiastic or determined to accomplish something.
motto - A short sentence or phrase that expresses the aims and beliefs of a person, a group, or institution.
mortal - Unable to continue living for ever.
momentary - Lasting for a very short time.
multitude - A large number of people or things
monstrous - Abnormally bad or shocking
mutiny - To refuse to obey orders, in an open revolt or uprising against leadership or control.
multitasking - Handling multiple responsibilities or activities simultaneously, the ability to perform more than one task at the same time.
morose - Sullen, gloomy, or depressed in mood.