slave
slave (slāv) noun
1. One bound in servitude as the property of a person or household.
2. One who is abjectly subservient to a specified person or influence: "I was still the slave of education and prejudice" (Edward Gibbon).
3. One who works extremely hard.
4. A machine or component controlled by another machine or component.
noun, attributive.
Often used to modify another noun: slave labor; a slave cylinder.
verb, intransitive
slaved, slaving, slaves
1. To work very hard or doggedly; toil.
2. To trade in or transport slaves.
[Middle English sclave, from Old French esclave, from Medieval Latin sclāvus, from Sclāvus, Slav (from the widespread enslavement of captured Slavs in the early Middle Ages). See Slav.]