* A misspelling: Perhaps you meant a similar-sounding word, like "selling," "selling," "ceiling," "silly," or "selling."
* A proper noun: It could be a name, a place, or a brand.
* A technical term: It could be a specific term in a niche field like science, engineering, or business.
To help me understand what you mean by "Sellig," please provide more context:
* What is the sentence or phrase you saw it in?
* What is the topic you are researching?
* What language is the word from?
With more information, I can give you a more specific and accurate answer.