The 'b' in doubt is silent.
The silent letter in the word crumb is the letter B.
the silent letter is "B"
B
The 'b' is silent in the word "plumber".
The "b" in "debtor" is silent.
The 'b' in doubt is silent.
Plumber is pronounced 'plumer' - the b is silent.
Bark Branch
The silent letter in the word crumb is the letter B.
the 'b" is silent
the silent letter is "B"
The "b" is subtle is silent.
silent b
B
B
B is the silent letter.