尖とがらせる

1. 1to sharpen (e.g. pencil) ; to pout (e.g. lips) Translated by Jiyomi
2. 2to get nervous ; to set one's nerves on edge Translated by Jiyomi
3. 3to raise (e.g. one's voice) Translated by Jiyomi

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JMdict entry 2785610. Source and licence.