ill-defined
US /ˌɪlˈdɪfaɪnd/
UK /ˌɪlˈdɪfaɪnd/

1.
schlecht definiert, unklar
not clearly or sharply defined or delineated
:
•
The boundaries of the property were ill-defined.
Die Grenzen des Grundstücks waren schlecht definiert.
•
His role in the project was ill-defined, leading to confusion.
Seine Rolle im Projekt war schlecht definiert, was zu Verwirrung führte.