When the cameraman approached it, the turtle ran away.
Don't go anywhere near my girlfriend!
Strange as it is, the zombie approaching us right now is actually my type.
Because this word ends with an う sound, you can tell it's probably a verb. The kanji portion means near. The verb version of that is to draw near, to get close or to approach. Essentially, the general idea is that you're getting closer to something. You're becoming more nearby. You're approaching.
There's hiragana attached to this kanji, which means it's probably the kun'yomi reading (and it is). You've seen the kun'yomi reading via the word 近い. So, as long as you know that word, you should be able to read this one as well.