Unadulterated is a related term of trustworthy.
As adjectives the difference between unadulterated and trustworthy
is that unadulterated is pure; not mixed or adulterated with anything while trustworthy is deserving of trust, reliable.
unadulterated
English
Adjective
(-)
pure; not mixed or adulterated with anything
utter or out-and-out, especially in the phrase unadulterated truth
trustworthy
English
Synonyms
* believable
* convincing
* credible
* dependable
* ethical
* honest
* honorable
* kosher
* principled
* reliable
* responsible
* righteous
* secure
* sensible
* straight
* true
* trusty
* truthful
* unfailing
Antonyms
* untrustworthy