Discredit

Dis+cred+itum

Verb

To injure tthe credit or the reputation of

Dis=away

Credit=reputation or esteem

Credence

Cred+ence

Noun

Belief  as to the truth of something

Cred= to believe

ence=suffix

Incredible

in+cred+ible

Adjective

So extraordinary as to seem impossible to believe

In=in

credible=believable

Credentials

Cred+ent+ials

Noun

Evidence of authority,status, rights, and entitlement to privileges, usually in written form

Credence=truth

al=suffix

Credibility

Cred+ible+ile+ity

Adjective

Capable of being believed. Believable.

Cred= to believe

ibilis=suffix

Creditor

cred+itor

Noun

A person or firm to whom money is due

Credit

cred+itum

Noun

 Commendation or honor given for some action, quality, etc.

Creed

creed

Noun

Any system, doctrine, or formula of a religious belief, as a denomination

Creed= i believe;see