Porcupines and hedgehogs must ingest a large amount of salt to maintain their metabolism, hence to obtain salt, the animals are in fact quite bold and fearless (or, stupid), and will eat nearly anything that smells salty (feces are often quite salty) being uninhibited by nature:「pig snout surrounding anal orifice muck hole woody fruit.」「Pig snout」perhaps representing that animal's excellent sense of smell, adapted so well that it can detect mushroom truffles growing many feet underground (some say 3 feet, others say 25 feet). With「surround」and「effect, results」to suggest that a pig's snout can COLLECT mushrooms or whatever else it is trained to locate. Pigs are used by police agencies as drug-sniffers and are more acute at smelling than dogs, but have not replaced them generally since a pig is not normally interested in helping an officer collar the person believed to be in possession of outlawed paraphernalia and other substances, and since swine habitually defecate whenever and whenever the need emerges, which does not please most airport management personnel.
The Japanese pronunciation for this glyph is「needle rat (quill rodent)」and generally refers to a porcupine or hedgehog. Elements of「pig-snouted」as the「hog」in hedgehog, the「porc」in porcupine, and「surround on all sides」refer to the animal's instinctive defense mechanism of rolling its body into a ball「to the limit」when confronted by a predator or enemy, and binding all sides into a protective mass of protruding quills, literally COLLECTING itself into a ball, CLUSTERING. Porcupines and hedgehogs are rather slow to move, so instead「remain surrounded and in need of protection」with a COLLECTION of similar items as its 30,000 or so quills perhaps, the only things visible「on all sides」when in a defensive posture. The quills are effective for「plugging with a shaft」into the flesh of an attacker, but the actual reproductive strategy used by these animals may be another meaning altogether (see related glyphs for details).

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: class; collection
Japanese EDRDG: same kind
Unihan extended: collect, compile, assemble; hedgehog