① 鍛えて強くした鉄。鋼、はがねと同義。② 極めて硬いものや強いものの比喩
① 車両がルート上に設置された軌条（レール）などに沿って走行する交通機関。
① 地下鉄道の略。大都市における効率的な土地利用を目的に敷設され、主たる軌道及び駅設備の多くを地下に有する鉄道のこと。
iron pipe; steel pipe; metal pipe
iron rod; iron bar; iron club; horizontal bar (gymnastics)
impudence; shamelessness; brazenness; arrogance; audacity; effrontery
armor; armour; armor plate; armour plate
iron rust; iron hydroxide
elbowing (someone); rejection; rebuff
① 網状や螺旋状に配置された有刺鉄線。柵として用いる。
(iron) dumbbells; (pair) of dumbbells
short blade; small weapon; epigram; pithy saying
metal ring; metal hoop; trivet; train wheel; train
iron maiden (torture device)
wire mesh net; net made out of metal wire
iron mask (worn by samurai)
sago cycad (Cycas revoluta); king sago palm; sago palm; Japanese sago palm
(medicinal) iron preparations
railway police; railroad police
(iron) dumbbells; (pair) of dumbbells
gold and iron; firmness; adamancy
railway enthusiast who enjoys riding trains
iron-deficiency anemia; iron-deficiency anaemia
iron sulfate; ferrous sulfate; ferric sulfate
slate gray unpatterned cloth
Tieguanyin (variety of oolong tea)
railfan; rail fan; rail buff; train buff
iron sulfide; iron sulphide
iron overload; hyperferremia
strike while the iron is hot
railfan; rail fan; rail buff; train buff
strike while the iron is hot
iron hydroxide; ferrous hydroxide; ferric hydroxide
composite vessel construction (wood, iron, etc.)
iron yeast; iron-enriched yeast
deferrization; iron removal (using a magnet, etc.)
mother who is interested in trains
potassium ferrocyanide; potassium ferricyanide
galvanized iron; galvanised iron
Tiele people; a Central Asian Turkic people
Nippon maple (Acer nipponicum)