KanjiJLPT N1
Spider

Mnemonic

An insect stumbles into a web spun from vermilion silk. At the center crouches a spider whose body glows that same vermilion red — she dyes every strand to lure curious insects straight into her deadly, crimson trap.
Additional thoughts
Picture a bright red spider on a vivid red web — the vermilion color makes the whole scene unmistakable. The insect radical tells you it's a creature; vermilion gives the phonetic hint and the striking visual.
Quick recall
An insect trapped in vermilion silk reveals the spider waiting at its center.

Details

The keyword for 蛛 is spider. This kanji refers specifically to spiders, the eight-legged arachnids known for spinning webs. It appears most commonly in the compound 蜘蛛 (くも), which is the standard Japanese word for spider. On its own, this character carries the essential meaning of these web-weaving creatures found throughout the world.
On'yomi
ちゅ、しゅ

Used in vocab