the word 'splintery' is a straightforward english formation. its core, 'splinter', entered english from middle dutch or middle low german, where it originally referred to a thin, sharp fragment of wood or metal. the addition of the native english adjectival suffix '-y', which has proto-germanic origins, creates a descriptive term. therefore, 'splintery' literally means "characterized by or full of splinters," a meaning that has remained transparent and consistent from its formation to its modern usage.

Structure: splinter (splinter) + y (adjective-forming suffix) splinter (from middle dutch or middle low german 'splinte', 'splinter', meaning a thin, sharp piece of wood or metal); y (from old english '-ig', an adjective-forming suffix meaning 'characterized by; full of').