hypothecate
verb
[ hʌɪˈpɒθɪkeɪt ]
• pledge (money) by law to a specific purpose.
• "she arranged to hypothecate her half of the equity to pay for the charter"
Origin:
early 17th century: from medieval Latin hypothecat- ‘given as a pledge’, from the verb hypothecare, based on Greek hupothēkē (see hypothec).