完
wán
完 does not say finished. It says you can see the bottom
The picture A bowl scraped until the bottom shows. There is nothing left to spoon out. 完 is the amount running out; 好 is it turning out right and ready to use — 饭做完了 and 饭做好了 are not the same.
Where the picture shows up in 完
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the pages run out
我看完这一章就睡。
wǒ kàn wán zhè yì zhāng jiù shuì
I'll read to the end of this chapter and go to bed.
The pages under your thumb thinning out until the last one turns and the chapter is spent.
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the money runs out
卡里的钱花完了。
kǎ li de qián huā wán le
The money on the card is gone.
The balance on the card ticking down a notch at a time until it stops at zero.
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the meeting runs out
会开完了吗？我在门口等。
huì kāi wán le ma? wǒ zài ménkǒu děng
Is the meeting over? I'll wait by the door.
Agenda items wiped off the whiteboard one by one until the last line is blank and people stand up.
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until the pills run out
药要吃完再去复诊。
yào yào chī wán zài qù fùzhěn
Finish the course, then come back for a check-up.
The strip of pills shrinking day by day until you tear off the last one and only empty foil is left.
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the bottom is out of reach
这些活儿今天做不完。
zhèxiē huór jīntiān zuò bu wán
There's no finishing this lot today.
Shovelling at a heap of work all day and still not seeing the bottom when the sun goes down.
完 is about the amount running out; 好 is about it turning out right and ready. 饭做完了 and 饭做好了 are not the same.
All of it in one picture
完 is one picture: a bowl scraped until the bottom shows. Pages left at zero means you have read it through; a card balance at zero means the money is spent; agenda items at zero means the meeting is over. Going on until the pills hit zero is finishing the course, and never reaching the bottom of the pile is not getting the work done today. So 完 says nothing about how well it went — only that the amount left has hit zero.