The government has signally failed to deal with the problem.signallysig‧nal‧ly /ˈsɪɡnəli/ adverb formal 
The government has signally failed to deal with the problem.
EXAMPLES FROM OTHER DICTIONARIES
- Conventional ideas have signally failed to deal with new developments in technology.
- Demographic pressures were signally important in producing change in the educational system.
- Except for the historians and the sociologists of knowledge, the process of getting there is signally uninteresting.
- The ordinance signally failed to arrest the concentration of ownership which developed apace from 1951.
COLLOCATIONS FROM THE ENTRY The government has signally failed to deal with the problem.
The government has signally failed to deal with the problem.WORD FAMILYnounsignsignalsignatorysignaturesigningsignallerverbsignsignaladjectivesigned ≠ unsignedadverbsignally
very noticeably: The government has signally failed to deal with the problem.