短刀 (たんとう)short sword; knife; dagger

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

Kanji in 短刀

短期たんきshort-term
短大たんだいjunior college; vocationally oriented two or three year post-secondary education institution
短歌たんかtanka; 31-mora Japanese poem
短縮たんしゅくshortening; contraction
長短ちょうたん(relative) length
短期間たんきかんshort term; short time
短時間たんじかんshort time
短編たんぺんshort (e.g. story, film)
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 短刀 connects to the rest of Japanese.