THESAURUS
gravely
bleakly, decorously, demurely, dismally, drearily, earnestly, formally, funereally, gloomily, grandly, grimly, heavily, imposingly, intensely, loftily, magisterially, majestically, nobly, regally, royally, sadly, sedately, seriously, severely, sober-mindedly, soberly, sobersidedly, solemnly, somberly, sombrously, staidly, stately, thoughtfully, venerably, with dignity, worthily