fealty

詳細解釋：

fe.al.ty

n.（名詞）
【複數】 fe.al.ties

The fidelity owed by a vassal to his feudal lord.
效忠：諸侯對封建領主的忠誠
The oath of such fidelity.
對此類效忠的宣誓
Faithfulness; allegiance.See Synonyms at fidelity
孝順；忠誠參見 fidelity

來源：
Middle English fealtye
中古英文 fealtye
from Old French fealte
源自 古法文 fealte
from Latin fidôlit3s [faithfulness]
源自 拉丁語 fidôlit3s [忠誠]
from fidôlis [faithful]
源自 fidôlis [忠誠的]
from fidôs [faith] * see bheidh-
源自 fidôs [忠誠] *參見 bheidh-