unadventurous

unadventurous /ˌʌnədˈvɛntʃərəs/ adjective
unadventurous
/ˌʌnədˈvɛntʃərəs/
adjective
Britannica Dictionary definition of UNADVENTUROUS
[more unadventurous; most unadventurous]
1 
: afraid to do or try new and dangerous or exciting things
2 
: not exciting or unusual