孤单 vs 孤独 vs 寂寞 usage so far I went through a few forums to look at existing questions on 孤单 vs. 孤独 vs. 寂寞 usage. The answers from each person have a bit of difference so I would like to check if what I understood so far is correct. Based on what I researched and compiled together so far:

孤单 seems to mean alone physically and having no one to rely on even if the person has many friends. 

孤独 seems to mean the person has many friends but no one understands the person so the person feels alone in the heart. 

寂寞 seems to mean no one is around or with the person so the person feels alone. 

What do you guys think about this? Feel free to give some opinions and sample sentences if I made some mistakes!
孤 =(alone);单 = (single)
孤单 = alone/ solitary

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孤=(alone); 独 = (single/alone)
孤独 = alone/ solitary/ unsociable

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寂 = quiet; 寞 = deserted
寂寞 = lonely; loneliness


孤单 mainly describes a physical state of being alone. It can be used to describe a feeling of loneliness, as in &quot;感到孤单&quot; (feel alone = lonely)

孤独 also describes a physical physical state of being alone. It can be used to describe a feeling of loneliness, as in &quot;感到孤独&quot; (feel alone = lonely), It can also be used to describe a personality, as in &quot;他性恪很孤独&quot; (he is very unsociable) - You cannot say &quot;他性恪很孤单&quot;

寂寞 is mostly an emotion or feeling. You can be surrounded by friends and still feel lonely. For example: &quot;無敵是最寂寞&quot; (unrivaled people are the most  lonely people)


People do not physically being 寂寞; being physically 孤单/孤独 (alone) can make you feel 寂寞, but being 寂寞 (lonely) doesn't require being alone
Actually, feeling 孤单/孤独 (feel alone = lonely) doesn't require physically  being alone