How to Say "crammed" in Spanish
The Spanish word for “crammed” is “repleto” — B1 level. This is a very common word in everyday Spanish.

Examples
El centro comercial está repleto de gente por las rebajas.
The shopping mall is packed with people because of the sales.
Tengo el buzón repleto de correos sin leer.
I have my inbox stuffed with unread emails.
Sus ojos estaban repletos de lágrimas de alegría.
Her eyes were full of tears of joy.
The 'De' Connection
When you want to say what something is full of, always use the word 'de' (of) immediately after 'repleto'.
Matching the Subject
Because it's an adjective, the ending must change to match the gender and number: repleto (masculine), repleta (feminine), repletos (plural masculine), repletas (plural feminine).
Using 'Ser' instead of 'Estar'
Mistake: “El vaso es repleto.”
Correction: El vaso está repleto. Use 'estar' because being full is a state or condition, not a permanent identity.
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