To say the least if you try an open a coconut the wrong way, you’re going to get tired and it still won’t open. The easiest way it to use a meat cleaver. Hold the coconut in the palm of your hand and strike the coconut with the dull side of the cleaver several times. Remember to use the dull side and not the sharp side! You are holding it in your hand so it could be a bit dangerous if you use the sharp side!