Cantharid refers to a substance derived from the blister beetle that contains the active ingredient cantharidin. Its IPA phonetic transcription is /ˈkænθərɪd/. The word has a silent 'h' after the 'c' which indicates that the 'c' is pronounced as /k/. The letter 'a' is pronounced as /æ/ which is a short vowel sound. The letter 'r' is pronounced as a trill /r/ sound while the 'i' followed by 'd' is pronounced as /ɪd/ due to the addition of a suffix.
The word cantharid does not have an established etymology as it is not a recognized English word. It might be a misspelling or not commonly used. However, there is a similar word cantharidin that has a recognized etymology.
The word cantharidin is derived from the Latin word cantharis, which means blister beetle. Cantharidin is a toxic substance found in the bodies of blister beetles, and it has been historically used for medical and pharmaceutical purposes due to its blistering properties. The word cantharis itself is believed to have originated from the Greek word kantharis, which also means blister beetle.