IPA: /əˈsɛvərətɪv/
KK: /əˈsɛvərətɪv/
Describing something that is stated or asserted strongly and positively.
The lawyer made an asseverative statement to emphasize his client's innocence.
Asseverative is formed from "asseverare" (meaning to affirm or declare positively) and the suffix "-ive" (meaning having the nature of). The word describes something that has the nature of affirming or declaring positively.
Think of 'affirming' something strongly — 'asseverative' means having the nature of making a strong declaration.