святка, усмивка (поетично, литературно)

I'm sorry, but it seems there is a misunderstanding. The term "святка, усмивка (поетично, литературно)" appears to be in Bulgarian, not Spanish. In Bulgarian, "святка" can be related to "lightning" or "flashing," and "усмивка" means "smile." However, I can provide definitions and examples for these concepts in Spanish if that would be helpful. Please let me know how you would like to proceed! tuntematon