Adjective
lacking in boldness
Source: WordNetModeration, the Golden Mean, the Aristonmetron, is the secret of wisdom and of happiness. But it does not mean embracing an unadventurous mediocrity: rather it is an elaborate balancing-act, a feat of intellectual skill demanding constant vigilance. Its aim is a reconciliation of opposites. Robertson Davies
I often think how unadventurous my life must seem from the outside, though I do like my job. Mary Hoffman
In my normal life I'm a very unadventurous person. Brian Eno
As such, it is easy for them to be erroneously branded unadventurous and dull in sexual matters. citation Paper on the difficulties facing "vanilla partners". Source: Internet
The orchestral parts for his concertos were often polite, unadventurous, and clearly supportive of the soloist. Source: Internet
When looking at conventional sex with disdain, it may be described as unadventurous or dull. Source: Internet