The word "QAS CDER" appears to be an acronym or abbreviation with no clear meaning. However, the spelling can be explained using the International Phonetic Alphabet (IPA). "Q" is pronounced as /kw/ and "AS" is pronounced as /æz /. "C" is pronounced as /k/, "D" is pronounced as /d/, "E" is pronounced as /ɛ/, and "R" is pronounced as /ɹ/. Therefore, "QAS CDER" would be pronounced as /kwæz kdiɛɹ/. Despite the phonetic accuracy, the spelling remains a mystery without further context.