空気の汚染が深刻

N4 空気 kuuki air, atmosphere, mood N3 汚染 osen pollution, contamination N3 深刻 shinkoku serious, grave, severe

N4 空 kuu / sora, a.ku, a.ki, a.keru, kara, su.ku, su.kasu, muna.shii empty, sky, void N5 気 ki, ke / ki spirit, mind, air N2 汚 o / kega.su, kega.reru, kega.rawashii, yogo.su, yogo.reru, kitana.i dirty, pollute, disgrace N1 染 sen / so.meru, so.maru, shi.miru, shi.mi dye, color, paint N3 深 shin / fuka.i, -buka.i, fuka.maru, fuka.meru, mi- deep, heighten, intensify N3 刻 koku / kiza.mu, kiza.mi engrave, cut fine, chop

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase