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尖る， 尖がる， 尖んがる， とがる， とんがる
1. to taper to a point, to become pointed, to become sharp
2. to look displeased, to look sour, to be on edge, to be touchy
逐渐变细成尖，变得尖锐，变得锋利
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
