blunt instrument

:  slow or deficient in feeling :  insensitive

:  obtuse (see obtuse 2a) in understanding or discernment :  dull

:  having an edge or point that is not sharp

:  to make less sharp, definite, or forceful

:  to become blunt (see ¹blunt)

:  a cigar that has been hollowed out and filled with marijuana

:  a device used to produce music

:  a singing voice

:  a means whereby something is achieved, performed, or furthered

:  to address a legal instrument to

:  to score for musical performance :  orchestrate

:  to equip with instruments especially for measuring and recording data