IPA: /ˌæntiˈsiːkrəsi/
KK: /æntiˈsiːkrəsi/
Describing something that is against or challenges the idea of keeping information hidden.
The antisecrecy movement aims to promote transparency in government operations.
Antisecrecy is formed from "anti-" (meaning against) and "secrecy" (from Latin "secretus", meaning hidden or concealed). The word refers to the opposition to secrecy or the act of being against hidden information.
Think of being 'against' ('anti-') something that is 'hidden' ('secrecy') — that's why antisecrecy means opposing secrecy.