IPA: /ˌʌn.ədˈvɛn.tʃər.əs/
KK: /ʌnədˈvɛntʃərəs/
Not willing to try new or exciting things; preferring to stay with what is safe and familiar.
She is quite unadventurous and prefers to stay at home rather than travel to new places.
Unadventurous → It is formed from "un-" (meaning not) and "adventurous" (from Latin "adventurus", meaning about to happen or coming). The word "unadventurous" means not inclined to take risks or engage in adventure.
Think of 'not' ('un-') being added to 'adventurous', which means someone who is not inclined to seek out new experiences or adventures.