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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
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先端， 尖端， せんたん
1. pointed end, tip, point, cusp (of a leaf, crescent moon, etc.), apex (of a curve)
2. forefront, vanguard, spearhead, leading edge
尖端(如草叶尖、新月尖等)，顶点(如曲线顶点)；前沿，先锋