adj.不得转让的；不得让渡的；不能让与的

The property is unassignable due to its unique historical significance.
该财产因其独特的历史意义而不可转让。
The copyright of the book remains unassignable to any other party without the author's consent.
未经作者同意，这本书的版权不能转让给任何其他方。
The responsibilities of this role are non-negotiable and unassignable to others.
这个角色的责任是不可协商且不能转嫁给其他人的。
The legacy left by the artist was considered unassignable, as it held sentimental value only to her family.
艺术家留下的遗产被认为是不可转让的，因为它只对她的家庭具有情感价值。
Due to the sensitive nature of the project, all intellectual property rights are unassignable.
由于项目的敏感性，所有知识产权都是不可转让的。
The contract explicitly states that the rights and obligations are unassignable to a third party.
合同明确指出，权利和义务不可转让给第三方。
The personalized license plate is unassignable to another vehicle or owner.
个性化的车牌不能转让给另一辆车或车主。
The unassignable task of guarding the ancient artifact fell upon the family for generations.
守护古代文物这一不可转任的任务世代落在了这个家族上。
His unique skill set made him indispensable in his role, rendering it practically unassignable to anyone else.
他独特的技能组合使他在职位上不可或缺，实际上无法将此角色转给其他人。
The emotional connection to the family heirloom made it unassignable in any financial transaction.
对家族传家宝的情感联系使得它在任何财务交易中都不可转让。