Yes, disprove is a synonym of belie.
You said you were not dieting but your loose clothing belie that.
His calm demeanor belies the inner turmoil he is experiencing.
No it is is not, if you put another prefix than maybe there is something else.
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.
Discredit is closest in meaning to the word "disprove" or "detract." It typically refers to casting doubt on the credibility or reputation of something or someone.