ultrareliable
adjective
ul·tra·re·li·able ˌəl-trə-ri-ˈlī-ə-bəl 
: very capable of being trusted or relied on : extremely or extraordinarily reliable or dependable
an ultrareliable system/performer
Word History
First Known Use
1914, in the meaning defined above
- factitious disorders
- factitiously
- factitiousness
- factitiousnesses
- factitive
- factitively
- facto
- factoid
- factoids
- factor
- factor (in or into or out)
- factor (in or into)
- factor (out)
- factor analysis
- factor analytic
- factor group
- factor in or into
- factor in or into or out
- factor IX
- factor of production
- factor of safety
- factor out
- factor V
- factor VIII
- factor X