acuminate
/əˈkjuːmɪneɪt/
/əˈkjuːmɪneɪt/
verb
-
To render sharp or keen; to sharpen.
-
To end in or come to a sharp point.
adjective
-
Tapering to a point; pointed.
"acuminate leaves, teeth, etc."
-
Tapering to a long point in concave manner at its apex.