忍び返し

しのびがえしshinobigaeshi

noun

  1. bamboo wall-top spikes (or wood, iron)
  2. spikes placed at the top of a wall to repel thieves

Kanji in this word

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences