Japanese Grammar: Turning Adjectives into Nouns (形容詞の名詞化)

Grammar
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How to Turn I-Adjectives into Nouns

大おおきい (Big / Large) → 大おおきさ (Size)

Ex.: この箱はこの大おおきさがわかりますか。

Rm.: Kono hako no ookisa ga wakarimasu ka.
En.: Can you tell how big this box is?

明あかるい (Bright) → 明あかるさ (Brightness)

Ex.: パソコン画が面めんの明あかるさを調ちょう整せいしています。

Rm.: Pasokon gamen no akarusa o chousei shiteimasu.
En.: I’m adjusting my screen brightness.

How to Turn Na-Adjectives into Nouns

きれいな (Beautiful / Clean) → きれいさ (Beauty / Cleanliness)

Ex.: この湖みずうみの水みずのきれいさは有ゆう名めいです。

Rm.: Kono mizuumi no mizu no kireisa wa yuumei desu.
En.: The lake is famous for its crystal-clear water.

馬ば鹿かな (Stupid / Foolish) → 馬ば鹿かさ (Stupidity / Foolishness)

Ex.: 自じ分ぶんの馬ば鹿かさに呆あきれました。

Rm.: Jibun no bakasa ni akiremashita.
En.: I’m disappointed in myself for being so stupid.

Japanese Grammar (日本語文法)
Learn essential Japanese grammar for daily conversations with clear explanations, examples, illustrations, and English translations. Study Minna no Nihongo grammar for JLPT N4–N5.
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