1997 Honda Accord Start problem

Hi there, I have a 1997 Accord that occasionally will not start. When I turn the key to the start position the car will click quietly once, and never engage the starter. A jump from another car has not helped, but if you just keep trying it will eventually start. Sometimes it will start after a few try’s and other times it may take a while trying to get it to start. To this point I have only cleaned the battery terminals. What are some of the possible causes of this intermittent problem? Thanks!