IPA: /ˈæntiˌspæm/
KK: /ˈæntiˌspæm/
Related to measures or tools that prevent or reduce unwanted electronic messages, often in email.
The antispam filter successfully blocked all junk emails from reaching my inbox.
Antispam is formed from "anti-" (meaning against) and "spam" (from the 1970s Monty Python sketch, referring to unsolicited or irrelevant messages). The word "antispam" means against unsolicited messages, particularly in the context of email or online communication.
Think of 'anti-' meaning against, and remember that 'antispam' refers to measures taken against unwanted messages.