IPA: /ˌɪntəˈʧeɪndʒəbli/
KK: /ˌɪntərˈʧeɪndʒəbli/
In a way that allows two or more things to be used in place of each other without changing the meaning.
You can use the terms 'car' and 'automobile' interchangeably in this context.
Interchangeably → It is formed from "inter-" (meaning between) and "cambiare" (meaning to exchange). The word describes the act of exchanging or using things in place of one another, as if they are between each other.
Think of things being 'exchanged' ('cambiare') 'between' ('inter-') each other — that's why interchangeably means they can be used in place of one another.