筒
cylinder, pipe, tube, gun barrel, sleeve
Readings
On'yomi
- トウ
Kun'yomi
- つつ
Meaning
筒 centers on a hollow cylindrical shape: a tube, pipe, or cylinder. The gun barrel and sleeve senses are specific applications of that same tubular form.
Most common words using 筒
20 of 68- 筒つつN1
pipe; tube; cylinder
- 封筒ふうとうN5
envelope
- 水筒すいとうN2
canteen; flask; water bottle; thermos
- 気筒きとう
cylinder
- 筒井つつい
round well
- 円筒えんとう
cylinder
- 筒抜けつつぬけ
being heard (by others); being overheard; being leaked (of plans, secrets, etc.)
- 井筒いづつ
well curb; well kerb
- 竹筒たけづつ
container made by cutting a piece of bamboo lengthways; bamboo tube; bamboo cylinder
- 筒子ピンズ
dot tiles; circle tiles
- 発炎筒はつえんとう
(warning) flare (esp. used on roads and railways)
- 矢筒やづつ
quiver
- 発煙筒はつえんとう
smoke bomb; smoke candle
- くじ筒くじづつ
tube for shaking and dispensing lottery sticks
- クッション封筒クッションふうとう
padded envelope
- ロケット発射筒ロケットはっしゃとう
rocket launcher
- 円筒プリンターえんとうプリンター
barrel printer
- 円筒図法えんとうずほう
cylindrical projection
- 円筒形えんとうけい
cylindrical
- 写真天頂筒しゃしんてんちょうとう
photographic zenith tube
Study
Etymology
筒 combines 竹 (bamboo) with 同, which likely contributes the sound. Bamboo tubes or pipes are a natural source for the meaning of cylinder or tube.
Meaning mnemonic
Bamboo 竹 is naturally hollow and tubular, and 同 reinforces the idea of a uniform hollow shape. Picture a bamboo stalk cut into a straight cylinder or pipe.
Reading mnemonic
For トウ, imagine a toe stuck inside a narrow bamboo tube: toe -> トウ, and the tube is just wide enough for a toe.