粉々
こなごな · konagona · JLPT N1 · noun
piece
🧂 粉 (powder) + 々 (repeat mark) = powder, powder: smashed into tiny bits
々 is a repeat mark, so 粉々 doubles 粉 (powder). Shattered glass or crushed crackers end up こなごな: many fine pieces, like powder.
粉 — rice 米 + divide 分
A semantic-phonetic compound: 米 (rice/grain) gives the meaning, while 分 (fēn, 'divide') hints at the sound. It originally referred to rice flour or finely ground powder, then extended to any powder and to the pale pinkish color of such powders.