Godan verb with 'ru' ending, Intransitive verb
to taper to a point; to become pointed; to become sharp
この棒は先がとがっている。This pole is sharp at the end. to be on edge; to be nervous; to be irritable; to be touchy
to be sharp (of a voice, words, etc.); to be harsh; to be angry; to look displeased; to look sour
to be provocative; to be radical; to be rebellious
Also written 尖がる【とがる】