They might put you to sleep (5)
I believe the answer is:
bores
(Other definitions for bores that I've seen before include "Tedious people or drills" , "Makes a hole with a pointed tool" , "Drills or wearies" , "Dull tedious talkers" .)
I believe the answer is:
bores
(Other definitions for bores that I've seen before include "Tedious people or drills" , "Makes a hole with a pointed tool" , "Drills or wearies" , "Dull tedious talkers" .)