Today's word, stat, is interesting. Statim (the accusative of statis, used adverbially, a noun dervied from sto, stare, steti, statum 'to stand; (older) to set' (which is related to sisto, sistere, stiti 'to place, put, set'). Statim in Latin had two meanings: 'firmly, steadily, steadfastly' and 'forthwith, instantly, on the spot' (from which latter we get stat). There's also stet which is a hortatory subjunctive 'let it stand' still used as a proofreader's mark (e.g., written next to a crossed-out word to indicate that it should not be crossed out).