透過 (とうか)penetration; permeation; transmission

penetration; permeation; transmissionadjectival nouns or quasi-adjectives (keiyodoshi), noun (common) (futsuumeishi)

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

Kanji in 透過

不透明ふとうめいopaque; obscure
透明とうめいtransparent; clear
浸透しんとうpenetration (e.g. market); pervasion (e.g. thought, ideology)
透析とうせきdialysis
人工透析じんこうとうせき(artificial) dialysis
肩透かしかたすかしunder-shoulder swing-down; technique of grasping the arm of the opponent, the moment he comes forward, while stepping out of line and pushing down on the shoulder blade with the other hand, thus pulling him down
見透かすみすかすto see through; to see the true nature of something
透かしすかしwatermark (in a stamp, banknote, etc.)
過去かこthe past; bygone days
過程かていprocess; course
過半数かはんすうmajority
経過けいかpassage (of time); elapsing
過激かげきextreme; radical
通過つうかpassing through (a tunnel, station, town, etc.); passing by (e.g. of a typhoon)
過ぎすぎpast; after
過剰かじょうexcess; surplus

See how 透過 connects to the rest of Japanese.