0 past simple and past participle of sharpen
1 to make something sharp or sharper:
figurative The company is cutting production costs in an attempt to sharpen its competitive edge (= in order to improve how competitive it is).
2 to make something stronger:
3 to make something clearer:
I need to sharpen that knife.
She sharpened the blade.
In addition, class distinctions in political efficacy sharpened with time, as efficacy levels dropped noticeably among the working-class, but not the middle-class, identifiers.
The author was not only a privileged observer but also a secondary actor in the events of 1965 which sharpened the profile of this dispute.
The tip of the penetration side of the stoppers could be sharpened or curved.