Sharp accent (5)
I believe the answer is:
acute
I believe this is a double definition.
'sharp' is the first definition.
(I know that sharp can be written as acute)
'accent' is the second definition.
(acute accent is a kind of accent)
(Other definitions for acute that I've seen before include "far from chronic" , "Short and severe" , "Incisive" , "less than right" , "Extremely sharp or intense" .)