いい
ii
The moment 'that's fine' becomes a refusal
The picture You look at what's in front of you once, nod, and let it pass as it is. いい is the nod that lets it pass; 悪い is the shake of the head that turns it away.
Where the picture shows up in いい
-
a good thing
このカメラはいいですね。
kono kamera wa ii desu ne
This camera is nice.
The camera lifted to feel its weight, followed by a nod
-
allowed
窓を開けてもいいですか。
mado o ake-te mo ii desu ka
May I open the window?
A hand resting on the window frame, eyes on the other person waiting for the nod
〜てもいい is the pattern for asking and granting permission.
-
no thanks
いいえ、袋はいいです。
iie, fukuro wa ii desu
No, I don't need a bag.
A palm raised at the till to gently block the offered bag
いいです, said in the right tone, is a refusal: 'I'm fine without it'.
-
that works
明日の三時でいいですか。
ashita no sanji de ii desu ka
Is three o'clock tomorrow all right?
A finger on the three o'clock slot in a planner, eyes asking for confirmation
-
fine weather
今日はいい天気ですね。
kyō wa ii tenki desu ne
Nice weather today, isn't it.
The door opens on a cloudless sky and the head nods by itself
All of it in one picture
いい is one picture: a nod that lets something through. Nod at an object and it's well made; nod at a request and you may go ahead; nod at a time and the time is set. Nod at the sky and it's a fine day to go out — and nod at the bag held out to you, meaning 'it's fine as it is', and you have just turned it down.