も
mo
も puts one more thing on the same pile
The picture A hand setting one more thing on a pile that is already there. Everything lands in the same place.
Where the picture shows up in も
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me on the pile too
私も行きます。
watashi mo ikimasu
I'll come along too.
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today on the pile too
今日も残業です。
kyō mo zangyō desu
Overtime again today.
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neither one on the pile
お金も時間もありません。
okane mo jikan mo arimasen
I have no money and no time.
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a pile higher than expected
三時間も待ちました。
san-jikan mo machimashita
I waited three whole hours.
も on a number turns it into 'that much'. 三時間待った is a fact; 三時間も待った is a complaint.
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not once on the pile
一度も行ったことがありません。
ichi-do mo itta koto ga arimasen
I've never been there, not once.