terribly

terribly (http://definr.com/terribly)

     adv 1: (informal) used as intensifiers, as in "terribly
            interesting"; "I'm awful sorry" [syn: awfully, awful,
             frightfully]
     2: in a terrible manner; "she sings terribly" [syn: atrociously,
         awfully, abominably, abysmally, rottenly]