IPA: /ˌoʊvərˈæŋkʃəs/
KK: /oʊvərˈæŋkʃəs/
Feeling very worried or nervous about something, more than is usual or necessary.
She was overanxious about the upcoming exam, even though she had studied hard.
Overanxious → It is formed from "over-" (meaning excessively) and "anxious" (from Latin "anxius", meaning troubled or uneasy). The word "overanxious" means excessively troubled or uneasy about something.
Think of being 'excessively' ('over-') 'troubled' ('anxious') — that's why overanxious means being too worried.