noun
nail hider; nailhead cover
In traditional Japanese architecture, a decorative metal or wood cap that conceals the head of a nail, often used on pillars or beams.
この古いお寺の柱には、美しい釘隠しがはめ込まれている。
Beautiful nail hiders are set into the pillars of this old temple.
釘隠しは、釘の頭を隠
Nail hiders not only conceal nail heads but also serve a decorative purpose.
釘 is the nail itself, while 釘隠し is the decorative cover that hides it.
Compound of 釘 (kugi, 'nail') and 隠し (kakushi, 'hiding'), literally 'nail hider'.