"Susen" is not a commonly used word and it is not found in any dictionaries. However, the spelling can possibly be explained using International Phonetic Alphabet (IPA). The word "Susen" can be pronounced as /suːsən/ with a long "u" sound and the stress on the first syllable. The "s" sound is pronounced with a long "s" sound like in "super" and the "e" is pronounced as a schwa sound like in "sofa".