Superlative form of prickly: most prickly.(adjective)
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Use "prickliest" in a sentence
"But he knew, tomorrow she would be the prickliest of pears."
"But participants say that delegates in Nagoya have been unable to agree in two of the meeting's prickliest areas – setting a target for protected marine areas and setting up a system for equitably sharing the profits from genetic resources, such as plants that Western drug companies have harvested to produce drugs."
"And, of course, as she is a durian lover, one had to stop along the way to buy the world's smelliest, prickliest fruit."