the.com/prickliness

A cactus made of feelings, daring the world to come closer.

means The quality of being easily irritated, defensive, or touchy — quick to take offense at the slightest contact.

from From 'prickle,' which traces back to Old English 'pricel' (a small sharp point), kin to 'prick' and rooted in Proto-Germanic words for piercing or stabbing. The literal sense — the spines of a thorn or hedgehog — was carried over into temperament by the 19th century, when a person who bristled at the smallest touch came to be called 'prickly,' and the noun 'prickliness' followed naturally.

defense first
It assumes attack before anyone has lifted a finger.
thin skin
Often armor bolted over a wound, not strength.
contagious
One bristly person can sour a whole room fast.
sharp origin
Word comes from prick, sharing roots with thorns and stings.
for instance

hedgehog — mammal with 5,000-7,000 spines covering its body for defense

porcupine — rodent with 30,000 quills that detach when touched

sea urchin — marine animal with venomous spines that cause puncture wounds

gila monster — venomous lizard with beaded, spiky skin native to southwestern us

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