Yes, disprove is a synonym of belie.
You said you were not dieting but your loose clothing belie that.
No it is is not, if you put another prefix than maybe there is something else.
Belie means to be untrue or contradict. An example of usage could be, "The boys story seemed to belie that of his sisters.'
What does the term belie mean? The term belie means to disguise or contradict. Belie also means to fail to fulfill. That is what the term belie means.
The letters LEEBI unscramble to spell the word "belie" (contradict).
The word "credence" contains a word root that means believe.
The defence will attempt to disprove the evidence given by the first witness.
disprove
Disprove.
The root word for "disprove" is "prove." "Dis" is a prefix added to indicate negation or reversal, changing the meaning to "prove false."
There are many sentences you can make up for the word believe. You could say that you believe in miracles for example.
The closest word to discredit is disprove.