The phrase "tost down" can mean many things including "burned" or "destroyed." Some synonyms for "tost down" are "scorched," "incinerated," "ruined," "devastated," and "demolished." The word "tost" is quite old and often seen in literature from centuries ago, so some newer and more commonly used words that mean the same thing are "burnt," "charred," and "wrecked." Each of these words can convey a slightly different connotation depending on the context in which they are used, but they all describe destruction and damage. Whatever adjective you choose to describe a "tost down" scenario, it's clear that something catastrophic has taken place.