B2 adjective /ˌʌn.kəʊˈɒp.ər.ə.tɪv/
uncooperative
unkooperativ
Meaning
not willing to help or work with others; unhelpful
Example
The witness was uncooperative and refused to answer questions.
Der Zeuge war unkooperativ und weigerte sich, Fragen zu beantworten.