Pointy means narrowing to a sharp tip. Shoes, hats, teeth, ears.
It is the informal and slightly childish version of pointed, which is why it suits describing a witch's hat or a dog's ears and would look odd in a technical document. Fashion uses it for shoes constantly. There is a fine British compound in pointy-headed, borrowed from American political insult, meaning an intellectual who is clever and useless. Tapering is the formal word for the same shape.
1adjectivepointyNarrowing to a sharp point.
“He was wearing extremely pointy shoes.”
Also accepted in games: pointed
Middle English
poynt
English
point
English, today
pointy
Built from
From point + -y. point comes from Middle English poynt. From Middle English poynt, from Old French point (“dot; minute amount”), from Latin pūnctum (“a hole punched in; a point, puncture”), substantive use of pūnctus, perfect passive participle of pungō (“to prick, punch”); alternatively, from Old French pointe (“sharp tip”), from Latin pūnctus, all from Proto-Italic pungō (“to sting, prick”). Mostly displaced native Middle English ord (“point”), from Old English ord (“point”). a doublet of pointe and ponto and puncto and punctum and punt and punto.
Etymology from Wiktionary, CC BY-SA