Invigorate means to give strength or energy to something or someone. If you're the new cheerleading coach, you can invigorate the team by bringing them your exciting new cheers, and the team’s growing popularity will invigorate them even more.
When you invigorate someone, you inspire, you breathe life into them. One of the best ways to invigorate another person is with your own enthusiasm — when you're animated and energetic, it seems to rub off on others. You might need to invigorate yourself when you first wake up in the morning, with a cup of coffee or a shower to get you going for the day. The word invigorate comes from the Latin in, "toward" and vigorare "make strong."