No. 1,150 in Japanese
効い
"効い" is not a standalone word. It is likely part of the verb "効く" (kiku), meaning "to be effective" or "to work (well)."
In a sentence
この薬はよく効いています。
This medicine is working effectively.
Here, '効い' (kī) is used to describe the effectiveness or functionality of the medicine.
彼のアドバイスは私には全く効きませんでした。
His advice had no effect on me at all.
In this context, '効い' (kī) refers to whether an advice produces a desired effect.
エアコンが効いている部屋は快適です。
A room where the air conditioning is working is comfortable.
'効い' (kī) here is used to indicate that the air conditioning system is functioning properly, resulting in a comfortable environment.
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