out-group
アウトグループ、外集団
in-group and out-group
/suto3/google.iconout-group
/suto3/Google画像検索.iconout-group
/suto3/Google定義検索.icon out-group
/suto3/wikipedia.iconout-group
/suto3/weblio.icon out-group
/suto3/kotobank.icon out-group
/suto3/jisho.icon out-group