We found one dictionary that defines the word sieng:

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1. Sieng: Wiktionary

Definitions from Wiktionary (Sieng) ▸ noun:  A surname from Khmer. ▸ Words similar to sieng ▸ Usage examples for sieng ▸ Idioms related to sieng ▸ Wikipedia articles (New!) ▸ Popular adjectives describing sieng ▸ Words that often appear near sieng ▸ Rhymes of sieng ▸ Invented words related to sieng