早
zǎo
Early, already, and good morning — one arrow backward
The picture Standing on the timeline to the left of the mark, ahead of where you were due. 早 stands ahead of the appointed time; 晚 stands behind it.
Where the picture shows up in 早
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I arrived early
今天我来早了。
jīntiān wǒ lái zǎo le
I got in early today.
Walking alone into an office where only half the lights are on
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before the appointment
您来得太早了,医生还没到。
nín lái de tài zǎo le, yīshēng hái méi dào
You're far too early — the doctor isn't in yet.
Sitting alone on a chair in an empty corridor outside the consulting room
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moved forward
早点休息吧。
zǎo diǎn xiūxi ba
Get some rest early.
The clock still reads early, but the light goes off and a body lies down
早点 commonly means 'a bit earlier'
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already, long since
我早就说过了。
wǒ zǎo jiù shuō guò le
I already told you.
Pointing back at words that were laid down a long way up the line
早就 has set into the meaning 'already'
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morning greeting
老板早,今天有点堵车。
lǎobǎn zǎo, jīntiān yǒudiǎn dǔchē
Morning, boss — traffic was bad today.
Two people meeting at dawn, heads dipping just slightly
The front end of the day became the greeting itself
All of it in one picture
早 is the stretch of the timeline ahead of the mark. Stand there yourself and you came early; stand there before an appointment and you are too early; pull bedtime forward and you rest early; put the moment of speaking far ahead and it becomes 'already'; sit at the very front of the day and it becomes a morning greeting.