The word "OETDTHD" is perplexing and difficult to spell without guidance. However, using the IPA phonetic transcription, it becomes clearer. The word is pronounced as "əʊ.i:.ti:.di:.eɪtʃ.di:". The vowels "o-e-t" are pronounced using a long "o" sound, followed by a "y" sound. The "dthd" cluster is pronounced with a "th" sound followed by a silent "d". Though confusing, understanding the phonetics of the word can help in remembering its peculiar spelling.