understand what
Trato de entender lo que pasaba por su cabeza.
I try to understand what was going through his mind.
— Tres colores. Azul (1993)
Tom no parece entender lo que Mary trata de decir.
Tom doesn't seem to understand what Mary is trying to say.
No puede entender lo que es amar a alguien.
He/She can't understand what it's like to love someone.
Tom y María no parecían entender lo que John quería que hicieran.
Tom and Maria didn't seem to understand what John wanted them to do.
Incluso un niño podría entender lo que te estoy diciendo.
Even a child could understand what I’m telling you.
Intente entender lo que le está pasando.
Try to understand what is happening to you.
Me tomó un poco de tiempo entender lo que ella trataba de decir.
It took me a little while to understand what she was trying to say.
Me fue muy difícil entender lo que él estaba diciendo.
It was very difficult for me to understand what he was saying.
Tom fingió no entender lo que Mary quería que hiciera.
Tom pretended not to understand what Mary wanted him to do.
No podíamos entender lo que ellos estaban tratando de decir.
We couldn't understand what they were trying to say.