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sharp (knife, claws, etc.); pointed
sharp (pain, tone, etc.); acute; stabbing; cutting (remark, criticism, etc.); stinging; biting; fierce (attack); pointed (question, look, etc.); piercing (gaze); shrill (sound)
keen (intuition, sense of smell, etc.); acute; sharp (eye, mind, etc.); astute; shrewd; discerning; penetrating (insight, question, etc.); perceptive
彼女は鋭い質問で相手を追い詰めた。
She cornered the other person with sharp questions.
彼の鋭い目つきに少し怖さを感じた。
I felt a bit scared by his sharp gaze.
新しく買った包丁の刃は鋭かった。
The blade of the newly bought kitchen knife was sharp.