This is the 3578th most frequent Spanish word.
izquierdo
Left; pertaining to the left side.
Here, 'izquierda' functions as an adjective modifying 'mano', indicating its position relative to the speaker.
Mi mano izquierda es más fuerte que la derecha.
My left hand is stronger than the right one.
In this sentence, 'izquierda' is used as a noun referring to the left side or direction.
Dobla a la calle de la izquierda.
Turn onto the street to the left.
Here, 'izquierda' denotes a political ideology or perspective, used in a more abstract conceptual sense.