But what if I want to say "very terrified"? As a side note, I was always amused by the number of generic superlatives available in many languages. In English, we've already got "very", and "damn" as the site mentions, along with "really", "extremely", "amazingly" and so on. In British English, you can say "bloody" or "damnedly" or "shockingly" or "terribly" or any of a vast number of other superlatives, not to ignore…
It comes from "vache", which is the French noun for "cow", but can also be used familiarly as an adjective that roughly translates to "nasty".
If you enjoyed "vachement", you will be happy to know that the French noun "bœuf" (the second letter is made of an O and an E), which became "beef" in English, can also be used familiarly as an adjective meaning something along "intense".