/ əˈsɜːtɪv; NAmE əˈsɜːrtɪv/ adjective
expressing opinions or desires strongly and with confidence, so that people take notice :
You should try and be more assertive.
assertive behaviour
OPP submissive
► as·sert·ive·ly adverb
► as·sert·ive·ness noun [ U ]:
an assertiveness training course