注: この項目の翻訳は現在品質確認中のため、一部の内容が一時的に英語のみで表示されています。
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fastness
The word "fastness" is a rare example of a term where the meaning changes drastically based on the register and professional context. It is almost never used as a single, general-purpose word in casual conversation.
In technical and industrial contexts, specifically textiles and chemistry, it refers to the resistance of a dye to fading or running. This is a specialized term (e.g., "color fastness") and is the most common modern usage of the word in a professional setting.
When referring to a secure place or fortress, the word is literary, archaic, or used within specific genres like historical fiction and fantasy. In modern English, words like "stronghold," "fortress," or "bastion" are far more common. It evokes an image of an inaccessible, rugged location.
While "fastness" can technically mean the quality of being fast (speed), this usage is extremely rare in contemporary English. Native speakers almost exclusively use the word "speed" instead. Using "fastness" to describe speed often sounds overly formal or antiquated and may be mistaken for the other meanings of the word.
意味
例文
この生地の染色の堅牢度は、何度も洗った後でも素晴らしい。
顔料の耐光性をテストして、色あせないことを確認しなければならない。
その山の要塞は、あらゆる侵略者を拒む天然の要塞だった。
その城は反乱の間、王族にとっての安全な拠点となった。
チーターの凄まじい速さが、獲物を簡単に捕らえることを可能にしている。