IPA: /ˌʌnroʊˈmæntɪk/
KK: /ʌnroʊˈmæntɪk/
Not having romantic qualities or feelings; lacking in romance.
He is known for his unromantic approach to relationships, preferring practicality over passion.
Unromantic → It is formed from "un-" (meaning not) and "romantic" (from Latin "romanticus", meaning having the qualities of romance). The word "unromantic" means not having the qualities or characteristics associated with romance.
Think of 'not' ('un-') when you consider the qualities of 'romance' — that's why unromantic means lacking those romantic qualities.