形容詞 VS 形容動詞

形容詞
Original Japanese words
Ends with い
For accent 0, accent is at な
For accent other than 0, accent is at 3 syllable left of く 
P.S. The four original colours in Japan 赤い、青い、白い、黒い ends with い only

形容動詞
Load words
Ends with だ(助動詞) hence 動詞
Modify nouns with な for easier articulation than だ

以上視頻來自何必日語教室