/kəˈmɪtmənt ˈlɛtər/ – Phrase
Definition: Thư cam kết
A more thorough explanation: a letter in which a lender (=person that provides the loan) sets out the terms on which it is prepared to lend money to the borrower (=person that receives the loan)
Example: Barclays Capital has issued a commitment letter for the US$140 million financing of the development project.