IPA: /ˌtɛstəˈmɛn.tə.ri/
KK: /tɛstəˈmɛnˌtɛri/
Related to a legal document that states how a person's property should be distributed after their death.
The lawyer explained the testamentary provisions of the will to the family.
Testamentary → It is formed from "testamentum" (meaning a will or testament) and the suffix "-ary" (meaning relating to). The word "testamentary" refers to matters relating to a will or testament.
Think of a 'testament' as a will, and remember that 'testamentary' means relating to a will.