also: ふゅえる
Loanword from English 'fuel', used in contexts such as energy, vehicles, or metaphorical drive.
This car is low on fuel.
新しいプロジェクトは彼の情熱のフューエルになった。
The new project became fuel for his passion.
Variant katakana spelling; less common but still used.
Borrowed from English 'fuel'.