understands it
I'm sure you understand.
Pero el mulo no lo entiende así.
But the mule doesn’t understand it that way.
— Por un puñado de dólares (1964)
Eres tú el que no lo entiende.
You’re the one who doesn’t understand it.
People don't understand it.
Se lo cuenta a ver si ella lo entiende.
He tells her about it to see if she understands.
— Los lunes al sol (2002)
She doesn't understand it.
Ese extraterrestre peludo no habla inglés, solo lo entiende.
That furry alien doesn't speak English; it only understands it.