IPA: /ˈprɪki/
KK: /ˈprɪki/
Having sharp points or thorns that can prick the skin; also used to describe someone who is easily annoyed or irritable.
The prickly cactus was difficult to handle without gloves.
Comparative: pricklier
Superlative: prickliest
Pricky is derived from "prick" (from Old English "pricca", meaning to pierce or stab) and the suffix "-y" (meaning characterized by). The word "pricky" describes something characterized by being sharp or having the quality of pricking.
Think of something that 'pierces' ('prick') and is 'characterized by' ('-y') sharpness or points — that's what pricky means.