Define Trustworthiness Meaning

The ability to be relied on as honest or truthful.

someone or something worthy of trust.

Adj.
Someone you can rely on to be honest, not to gossip, or tell your secrets to others. A person you can tell all of your secrets too without worry. Also someone you can rely on to set you straight and do the right thing even if it is not what you want.

Someone you can rely on even if you aren’t on good standards they won’t tell anyone anything you don’t want anyone knowing

Someone you can rely on to be there for you at the times you need them the most. Someone who won’t lie to your face or talk behind your back. The type of person that is hard to find.

Trustworthy is a way of describing someone to be trustful. If you think your friend is trustworthy then she/he is a very solid friend.

not Charles Darnay from "A Tale of two Cities" by Charles Dickens

Beard Trustworthiness is used to determine how trustworthy a particular beard/mustache is.

~~~Very Trustworthy~~~
Full Beard
The Philosopher
Goatee + Mustache

~~~Mildly Trustworthy~~~
Full Mustache aka The Wilford Brimley
Cop Mustache aka The Burt Reynolds
Chin Strap aka The Abe, The Lincoln

~~~Neutral~~~
Sideburns
Friendly Chops
Chin Tuft + Mustache aka The Colonel Sanders
Mutton Chops

~~~Questionable~~~
Sans Mustache aka Amish Beard
Curly Mustache aka The Handlebar
Goatee

~~~Threatening~~~
The Horseshoe aka The Hogan
Chin Tuft
Unkempt Beard aka The Homeless Beard
Neck Beard

~~~Dangerous~~~
Soul Patch aka The Landing Strip
Patchy Beard aka The Sidney Crosby
Pencil Thin Chin Strap

~~~Disastrous~~~
Werewolf
Pencil Thin Mustache aka The John Waters, The Joe Jackson
The Hitler

There is a sciene to getting people to trust you, but there's not one to actually being trustworthy. If you're the kind of person that has to put lots of extra effort into the science of gaining trust, or enticing people to trust you, it's usually because you were never really trustworthy in the first place due to your true intentions.