Learn how to say Thralldom correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word thrall:
1 [mass noun] literary the state of being in someone’s power, or of having great power over someone:
she was in thrall to her abusive husband
2 archaic a slave, servant, or captive.
(also thralldom) noun
Old English thrǣl ‘slave’, from Old Norse thræll