"Kdy přišel?"

[Chou117]

That's what she said.

[Maya943954]

Is this the same word as the word for "lose"? Can someone explain the connection?

[VladaFu]

Yes, but it is a very different meaning "přijít O něco". There is also "přjít k něčemu", to "come by"/get something.

There are also many English phrasal verbs with "come" https://www.learn-english-today.com/phrasal-verbs/phrasal-verbs-COME.html you also cannot easily explain how they are connected, because they in fact are not that much connected.