serf
Concise Oxford English Dictionary © 2008 Oxford University Press:
serf/sɜːf/
▶noun (in the feudal system) an agricultural labourer who was tied to working on his lord's estate.
– derivatives
serfage noun,
serfdom noun.
serfage noun,
serfdom noun.
– origin C15 (in the sense ‘slave’): from OFr., from L. servus ‘slave’.
'serf' also found in these Oxford entries:

