* Etymology: "Delight" comes from the Old English word "delyt", which itself comes from the Proto-Germanic "*dēluht". The "h" sound was present in these earlier forms.
* Sound Shift: Over time, the "h" sound in the Germanic languages began to disappear in certain positions, including the one present in "delight". However, the spelling remained, reflecting the earlier pronunciation.
* Silent "gh": This phenomenon is common in English, where the "gh" combination can be silent, as in "light", "night", and "sight".
So, the "gh" in "delight" is a relic of the word's earlier pronunciation, even though it no longer represents a sound in modern English. It's an example of how spelling in English can sometimes lag behind changes in pronunciation.