How to Say "desk mate" in Spanish
The Spanish word for “desk mate” is “compañera” — A2 level. This is a very common word in everyday Spanish.
English → SpanishA2
nounA2
a person sharing a desk or adjacent seating

Examples
Mi compañera de clase me prestó sus apuntes.
My classmate lent me her notes.
Necesito encontrar una nueva compañera de piso para el mes que viene.
I need to find a new flatmate for next month.
English Loan Words
Mistake: “Using 'roomie' instead of 'compañera de piso/cuarto'.”
Correction: While 'roomie' is understood in some youth circles, using 'compañera de piso' (Spain) or 'compañera de cuarto' (Latin America) is much clearer and more standard.
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