English:
* Silent "e" at the end of words: "make," "hope," "bike"
* Silent "b" before "m" or "p": "comb," "thumb," "debt"
* Silent "gh" in many words: "night," "laugh," "through"
* Silent "k" in "know" and "knife"
* Silent "h" in "honor" and "hour"
* Silent "w" in "write" and "wrong"
French:
* Silent "e" at the end of words: "le," "la," "une"
* Silent "h" at the beginning of words: "le hotel," "l'homme"
* Silent "s" at the end of words: "les," "vous"
* Silent "t" in "petit" and "fort"
Spanish:
* Silent "h" at the beginning of words: "hora," "hielo"
* Silent "u" in "guerra" and "guitarra"
Italian:
* Silent "h" at the beginning of words: "hotel," "hotello"
* Silent "e" at the end of words: "amore," "pane"
* Silent "g" in "gn" combinations: "agnolo," "bagno"
German:
* Silent "h" at the beginning of words: "Haus," "Hand"
* Silent "e" at the end of words: "Liebe," "Schule"
* Silent "w" in "Schwester" and "Schwein"
Other languages:
* Portuguese: Silent "h" in "hora," "honra"
* Russian: Silent "ь" (soft sign) at the end of words
* Arabic: Silent "ء" (hamza) at the beginning of words
This is just a brief overview. Many other languages have silent letters, and there are many nuances and exceptions within each language. The presence of silent letters can be a result of historical changes in pronunciation, grammatical rules, or simply the influence of other languages.