木釘 is read as きくぎ (kikugi) and means wooden peg.
きくぎ
kikugi
きわた
cotton (material)
ぼくた
wooden sword
きのは
leaf (of a tree)
こがらし
cold wintry wind
きのめ
bud of Japanese pepper tree (Xanthoxylum piperitum)
もくぞう
wooden
もくざい
lumber
き
wooden clappers (signalling the beginning or end of a performance)
もくよう
Thursday
きのみ
fruit of a tree
きずみ
charcoal
こかげ
shade of tree