The Correct spelling is: cider
Common misspellings of the word cider are:
How do you spell cider?. It is not cder or cdier or cide or cidr or cidre or ciedr or cier or icder or even ider for that matter!
The juice pressed from fruits, especially apples, used as a beverage or to make other products, such as vinegar.
[Middle English sidre, from Old French, from Late Latin sÄ«cera, intoxicating drink, from Greek sikera, of Semitic origin.]