IPA: /flɜːrˈteɪʃəsnəs/
KK: /flɜːrˈteɪʃəsnəs/
The quality of behaving in a playful and romantic way that suggests attraction to someone.
Her flirtatiousness made the party more lively and fun.
Flirtatiousness → It is formed from "flirt" (originating from the early 17th century, possibly from the Dutch "flirten", meaning to flick or to dart) and the suffix "-atious" (meaning characterized by) combined with the suffix "-ness" (meaning the state or quality of). The word "flirtatiousness" refers to the quality of being flirtatious or playful in a romantic or sexual manner.
Think of someone who is 'flicking' or 'darting' their attention playfully towards others, which helps you remember that 'flirtatiousness' is the quality of being flirtatious.