What does タンク mean?
タンク is a Japanese noun meaning “tank (of fluid); cistern; vat” in English. It can also be translated as “tank (military vehicle)” depending on context. It is written as タンク in hiragana, and tanku in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
ガソリンがなくなったので、予備タンクに頼った。
I fell back on the reserve tank when the gas ran out.