крепостной означает в английский

adscript▼(held to service as attached to the soil)
adjective
[UK: ədskrˈɪpt] [US: ədskrˈɪpt]

bondman [bondmen]▼(man bound in servitude)
noun
[UK: ˈbɒnd.mən] [US: ˈbɑːnd.mən]

serf [serfs]▼(semifree peasant)
noun
[UK: sɜːf] [US: ˈsɝːf]