According to the "Oxford Japanese Grammar & Verbs" book, "There are some words
which end in い even though they are な adjectives, not い adjectives. Such words
all end in -ei.".

But what about 嫌い? It ends with い (not -ei) but it's still a な adjective,
right?

It just doesn't really make sense to me but maybe I'm misunderstanding
something.
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2021-04-24T16:01:31.163
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question
na-adjectives
な adjectives with い always end with -ei?
「きれい」 and 「嫌い」are 2 most common な adjectives that ends with い so they are
exceptions from the rule.

I recommend checking this website
<http://www.guidetojapanese.org/learn/grammar/adjectives> for grammar
reference as it's written pretty clearly and does not overcomplicate things.
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2021-04-24T16:44:10.657
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answer
In "Oxford Japanese Grammar and Verbs" at page 100 they say:

> **な adjectives which end in い**  
>  There are some words which end in い even though they are な adjectives, not
> い adjectives. **Such words all end in -ei.** The most common are:  
>  きれい(な)・綺麗(な) pretty, clean, tidy  
>  しつれい(な)・失礼(な) rude  
>  ゆうめい(な)・有名(な) famous

I think this (=saying "Such words _all_ end in -ei.") is wrong.  
Not all な- adjectives that end in ～い(な) end in "-ei". We have:

>
> [意外]{いがい}な(-ai)、[優位]{ゆうい}な(-ui)、[不快]{ふかい}な(-ai)、[得意]{とくい}な(-ui)、[詳細]{しょうさい}な(-ai)、[純粋]{じゅんすい}な(-ui)、[偉大]{いだい}な(-ai)、[巨大]{きょだい}な(-ai)、[容易]{ようい}な(-ui)、[多彩]{たさい}な(-ai)、[平易]{へいい}な(-ii)、[奇異]{きい}な(-ii)、[簡易]{かんい}な(-n'i)、[不揃]{ふぞろ}いな(-oi),
> etc...
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answer