godan ~す verb / transitive:

• to sharpen (e.g. pencil); to pout (e.g. lips) ➜ 尖らせる【とがらせる】
• to get nervous; to set one's nerves on edge ➜ 尖らせる【とがらせる】
• to raise (e.g. one's voice) ➜ 尖らせる【とがらせる】

noun:

• endpaper (of a book); end-paper
• facing (material sewn on the inside edge of a garment)
• looking back; triumphing over (a rival) ➜ 見返す

noun:

• length of a blade (sword, knife, etc.)
• walking on the edge of a sword

noun:

• metallic - archaism
• cutting edge of a bladed instrument

godan ~る verb / intransitive verb:

• to taper to a point; to become pointed; to become sharp
• to look displeased; to look sour; to be on edge; to be touchy

godan ~つ verb / intransitive verb:

• to split finely; to splinter; to get frayed ➜ ささくれる
• to become irritable; to feel on edge ➜ ささくれる

noun:

• pointed end; tip; point; cusp (of a leaf, crescent moon, etc.); apex (of a curve)
• forefront; vanguard; spearhead; leading edge

noun:

• first runner (in a relay race)
• top-class runner
• vanguard (of a person); front line; cutting edge - idiom
• top runner (system of benchmarking against best-in-class performance)

noun:

• railway crossing; railroad crossing; train crossing; level crossing
• starting line; scratch
• determination
• stepping over the edge of the ring - Sumo term