stilltir

I’d like to confirm a bit more context to ensure I write an accurate article. What does “stilltir” refer to in your request? For example:

- Is it a word in a specific language (and if so, what does it mean there)?

- Is it a place, a person, a company, a fictional concept, or something else?

- Should I present a general disambiguation-style entry, a brief dictionary-style definition, or a concise article about one particular sense?

If you can provide the intended sense or context (language, domain, or a brief description), I’ll draft a neutral, concise wiki-style article under 300 words.