竹刀 (しない)bamboo sword (for kendo); bamboo fencing stick

竹刀, its kanji, and other words that share them.Open this graph

Kanji in 竹刀

竹たけbamboo (any grass of subfamily Bambusoideae)
爆竹ばくちくfirecracker
松竹梅しょうちくばいpine, bamboo and plum (an auspicious grouping)
破竹はちくbreaking bamboo
竹の子たけのこbamboo shoot
竹林ちくりんbamboo thicket; bamboo grove
竹細工たけざいくbamboo work; bamboo ware
竹馬たけうまstilts (for walking)
刀かたなsword (esp. Japanese single-edged); katana
一刀いっとうsword; blade
一刀両断いっとうりょうだんcutting in two with a single stroke
刀剣とうけんsword; dagger
剃刀かみそりrazor
単刀直入たんとうちょくにゅうstraight to the point; point-blank
執刀しっとうperforming a surgical operation
大刀たちlong sword (esp. the tachi, worn on the hip edge down by samurai); large sword

See how 竹刀 connects to the rest of Japanese.