The spelling of the word "eifler" is pronounced as [ˈaɪ.flər]. The "ei" sound is pronounced as the long "i" sound in English, like in the word "buy". The "fl" sound is non-native to English language and may be difficult to pronounce for those who do not speak German. The "er" sound is pronounced as the "uh" sound with a rolled "r" sound following. Overall, the pronunciation of "eifler" requires some familiarity with the German language and its phonetics.