Today's waves are very high, aren't they?
OMG! Koichi has been swallowed by a wave!
The rocking of the waves to and fro feels good.
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you to remember: You jump on a wave and ride around the world on it. It doesn't drop you off anywhere, until you reach a certain location: Vietnam (なみ). You jump off the wave and look at Vietnam. Imagine the most Vietnamese things you can think of to help you to make this wave-Vietnam association.