The word "sur-facing" is typically used to describe the process of bringing something to the surface or exposing it. Some antonyms for "sur-facing" might include "burying," "covering," or "concealing." By using these words, one can effectively describe the opposite process of "sur-facing." For example, instead of saying "the archaeologists are working to surface the ancient ruins," you might say "the builders are burying the foundations of the new building." Similarly, instead of "the detective surfaced new evidence in the case," you could say "the criminal concealed key evidence in the investigation." Overall, antonyms for "sur-facing" can be useful in communicating the opposite process of exposing or revealing something.