날카롭다 and 예리하다 are about the same as far as I know.
예리하다 is more formal (it's a hanja word) but both are widely used for both physical and non-physical things.
- 날카로운 / 예리한 유리 조각들 (sharp glass shards).
- 그의 비판은 날카로웠다 / 예리했다 (His criticism was sharp).
October 17, 2018
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