1550s, "severe toil, hard work, drudgery;" from slave (v.) + -ery. Meaning "state of servitude" is from 1570s; meaning "keeping or holding of slaves" is from 1728.
例文
1. They called on the authorities to make slavery a punishable offence.
彼らは当局に対し、蓄奴を罰せられるべき犯罪とするよう呼びかけた。
2.After 1760 few Americans refrained from condemning slavery as evil.