To pronounce "working" correctly, let's break it down into its sounds and look at the International Phonetic Alphabet (IPA) transcriptions for both British and American pronunciations:
The word "working" comes from the Old English weorc or werc, meaning "something done, discreet act performed, deed; military fortification," from Proto-Germanic werkam (source also of Old Saxon werc, Old Norse verk, Middle Dutch werc, Old High German werah, German Werk, Gothic gawaurki), from PIE root werg- "to do." The meaning specific to "labor as an economic function" emerged in Old English. The verb form "to work" has been in use since the 10th century, with "working" as its present participle and gerund form.