What is the relation and history of 'si' and 'sic'?

1. What is the origin of sic?
2. What does sic mean Latin?

What is the origin of sic?

Etymology and historical usage

The adverb sic, meaning "intentionally so written", first appeared in English circa 1856. It is derived from the Latin adverb sīc, which means "so, thus, in this manner".

What does sic mean Latin?

Definition of sic

The sic you see in quoted text marks a spelling or grammatical error. It means that the text was quoted verbatim, and the mistake it marks appears in the source. It's actually a Latin word that means “so” or “thus.”