giza-giza
A sharp, zigzag edge like a saw blade or the teeth of a serrated knife. Can also describe torn paper or mountain ridgelines.
💡Warning about a broken can lid — 'Be careful, the edge is giza-giza and could cut you.'
缶のふたがぎざぎざで危ない。
The can lid is giza-giza and dangerous.
The torn metal edge was ___ and sharp.
破れた金属の端が○○で鋭い。