assertive · adjective /əˈsɜrt.̬ɪv/Full view
C2 behaving or speaking in a strong, confident way
Dictionary example:

You need to be much more assertive.

Learner example:

I want to learn how to be more assertive, find emotional independence, fulfil my dreams, be more tolerant, less sarcastic and, most importantly, be given the precious gift of patience. (Certificate of Proficiency in English; C2; Portuguese)

Cambridge logo