IPA: /ˈspaɪki/
KK: /ˈspaɪki/
Having sharp points that stick out, like the spikes on a cactus or the hair on a punk hairstyle.
The spiky hair of the character made him look very unique.
Comparative: spikier
Superlative: spikiest
Spiky → It is formed from "spike" (from Old English *spica*, meaning a sharp point or projection) and the suffix "-y" (meaning characterized by). The word "spiky" describes something characterized by sharp points or projections.
Think of something that has sharp points or projections, like a spike, and remember that 'spiky' means having those sharp features.