The letter "d" is never silent at the beginning of a word in English.
There are some words that have silent letters, but they are typically within the word, not at the beginning. For example:
* "Knead" - The "k" is silent.
* "Whistle" - The "t" is silent.
* "Gnat" - The "g" is silent.
Let me know if you'd like to explore some more words with silent letters!