in·den·ture
noun/ɪnˈdentʃə(r)/
/ɪnˈdentʃər/
- a type of contract in the past that forced a servant or apprentice to work for their employer for a particular period of time
（旧时的）师徒契约 Word Originlate Middle English endenture, via Anglo-Norman French from medieval Latin indentura, from indentatus, past participle of indentare, from en-, in- ‘into’ + Latin dens, dent- ‘tooth’.