抜群/ばつぐん can be paraphrased as 群を抜く/ぐんをぬく, it means to be superior to many others, especially to be outstanding And 群れ is read as むれ=flock Memorizing words is not easy, but finding connections to other words will help you remember more words at once☺ #langtwt pic.twitter.com/nvIu74nRLb