Adjectives

-i adjectives are those which end in '-i', except those which end in '-ei'
(those are '-na' adjectives).
 
 

		big, wide
		small, narrow
		long
		short
		heavy; important
		light; inconsequential
		bright
		dark, dim
		tall
		cute
		big
		small
		new
	FURUI	old
	YOI,II	good
	WARUI	bad
	ATSUI	hot
	SAMUI	cold (environment)
	TSUMETAI	cold (object)
	MUZUKASHI	difficult
	YASASHI	easy
	TAKAI	tall / high / expensive
	HIKUI	short / low
	OMOSHIROI	interesting
	TSUMARANAI	boring

KONO KABAN WA OOKII DESU.
This handbag is big.
 

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-na Adjectives

		beautiful
	HANSAMU	handsome
	SHINSETSU	kind, helpful
	YUMEI	famous
	NIGIYAKA	noisy, lively
	SHIZUKA	quiet
	TAISETSU (NA)	important; beloved

KORE WA TAISETSU NA HON DESU.
This is an important book.
 

HANSAMU DESU.
He is handsome.

SHINSETSU DESU.
He is kind.

KONO HITO WA KIREI DESU.
This person is beautiful.

KONO TSUKUE WA KIREI DESU.
The desk is clean.

KONO HITO WA GENKI DESU.
This person is healthy.

YUMEI DESU.
He is famous.
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The negative of a -na adjective is formed as if it were a noun:

KORE WA TSUKUE DESU.	This is a desk.
KORE WA TSUKUE DEWA/JA ARIMASEN.	This is not a desk.
KONO HITO WA KIREI DESU.	This person is beautiful.
KONO HITO WA KIREI DEWA/JA ARIMASEN.	This person is not beautiful.
MACHI WA SHIZUKA DESU.	The city is quiet.
MACHI WA SHIZUKA DEWA ARIMASEN.	The city is not quiet.
MACHI WA NIGIYA DESU.	The city is noisy.