Wiktionary
unadventurous
a. Not adventurous
WordNet
unadventurous
adj. lacking in boldness [ant: adventurous]
Usage examples of "unadventurous".
And NASA showed many symptoms of an aging, arteriosclerotic, overcautious, unadventurous bureaucracy.
She was a homebody who one day might marry an equally unadventurous man who liked his home comforts.
Gillian Ashton was a plain, ordinary woman who lived a placid and unadventurous life.