ブラウザの設定でJava Scriptの使用を有効にしてご利用ください。
出典:Wiktionary
From 古期英語 friborh, from fri (“peace”) + borh, borg (“pledge”), akin to English borrow. The first part of the word was confused with free and the last part with borough.
friborg (複数形 friborgs)
friborg