соблюдение
observantia [ae, f]
письменный
scriptus [a, um];
напрасно
frustra;
inaniter;
nequiquam;
probus [a, um] ; probatus [a, um] ; vetus [e]ris (imperator); expertus [a, um] ; experimento probatus [a, um] / exploratus [a, um] ; experientia cognitus [a, um] ;