How to Say "friendliness" in Spanish
The Spanish word for “friendliness” is “amabilidad” — A2 level. This is a very common word in everyday Spanish.
English → SpanishA2
nounA2
a warm and welcoming attitude

Examples
Le agradezco mucho su amabilidad.
I really appreciate your kindness.
Ella siempre nos recibe con mucha amabilidad.
She always welcomes us with great friendliness.
¿Podría tener la amabilidad de abrir la puerta?
Could you have the kindness (be so kind as) to open the door?
The '-dad' Ending
In Spanish, words that end in '-dad' (like amabilidad, felicidad, or ciudad) are almost always feminine. This means you should use 'la' or 'una' with them.
Using 'el' instead of 'la'
Mistake: “el amabilidad”
Correction: la amabilidad (because words ending in -dad are feminine).
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