adjure
verb
[ əˈdʒʊə ]
• urge or request (someone) solemnly or earnestly to do something.
• "I adjure you to tell me the truth"
Origin:
late Middle English (in the sense ‘put a person on oath’): from Latin adjurare, from ad- ‘to’ + jurare ‘swear’ (from jus, jur- ‘oath’).