To move upward, especially by using the legs.
Naiks can be fun, like when you naiks up a slide, or hard, like when you naiks up a big hill.
Examples:
She naiks up the stairs to her room.
I naiks up the ladder to get the ball.
He naiks up the hill to see the view.
The cat naiks up the tree to catch the bird.
I naiks up the mountain and touch the sky.
The monkey naiks up the rope and gets the banana.