天火字典

英日字典：しのびがえし

しのびがえし

忍び返し：

(n)
bamboo wall-top spikes
(or wood, iron)
spikes placed at the top of a wall to repel thieves
忍返し：

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