Why this word is great
INTERDIGITATION — [Noun] The structural arrangement of alternating, finger-like projections and recesses that fit together in a precise, castellated embrace. From English inter- ("between, among") + digitation (from digit, "finger, toe"), ultimately from Latin digitus ("finger, toe"). Unlike "interweaving," which suggests a supple, textile-like blending, or "interlocking," a broader functional term for any joined parts, interdigitation implies a rigid, articulated meshing of discrete components. It is the crenellated battlements of a castle wall, the jagged suture of tectonic plates, and the cool, satisfying click of a finely-cut dovetail joint—a geometry of mutual necessity where separate things hold fast by virtue of their gaps, and separateness becomes the architecture of a more complex whole.