This is the 42nd most frequent Portuguese word.
mesmo
"Mesmo" means "same," "even," "self," or "indeed," depending on context.
In this sentence, 'mesmo' acts as an adverb meaning 'even though', expressing concession.
Eu gosto do sorvete, mesmo sendo muito frio.
I like the ice cream, even though it's very cold.
Here, 'mesmo' is used as a pronoun meaning 'the same', referring to something previously mentioned.
Eles disseram o mesmo sobre o filme.
They said the same about the movie.
In this case, 'mesmo que' is a conjunction meaning 'even if', introducing a hypothetical or challenging condition.