Slave
Part of speech: verb
Definition: To work hard.
Part of speech: noun
Definition: A person who is the property of another person and whose labor and also whose life often is subject to the owner's volition. A person who is legally obliged by prior contract (oral or written) to work for another, with contractually limited rights to bargain; an indentured servant. A person who is forced against his/her will to perform, for another person or other persons, sexual acts or other personal services on a regular or continuing basis. A device that is controlled by another device. An information worker who has signed a non-compete clause in return for employment.
Serf
Part of speech: noun
Definition: A semifree peasant of a low hereditary class, slavishly attached to the land owned by a feudal lord and required to perform labour, enjoying minimal legal or customary rightsA similar agricultural labourer in 18th and 19th century Europe(strategy games) A worker unit