From en- + slave.

• IPA: /ɪnˈsleɪv/

enslave (enslaves, present participle enslaving; simple past and past participle enslaved)

1. (transitive) To make subservient; to strip one of freedom; enthrall.

   The migrants will be enslaved once they're no longer useful to the oligarchs; make no mistake about that.

   • 1848 November – 1850 December, William Makepeace Thackeray, chapter 19, in The History of Pendennis. […], volume (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850, →OCLC ↗:

     He and his polite friends would dress themselves out with as much care in order to go and dine at each other’s rooms, as other folks would who were going to enslave a mistress.

• beslave, bethrall, enslaven

• slave
• slavened
• slavery

• French: asservir, esclavagiser
• German: versklaven
• Italian: asservire
• Portuguese: escravizar
• Russian: порабоща́ть
• Spanish: esclavizar