Double; twofold — having two layers, parts, or being duplicated (a two-layered or twofold condition).
この建物は二重構造になっていて断熱性が高い。
This building has a double-layered structure and high insulation.
二重の鍵が付いているドアは防犯性が高い。
A door with double locks is more secure.
遺伝子に二重の異常が見つかったため、さらに検査を行った。
Because a double abnormality was found in the gene, further tests were conducted.
Used as a prefix meaning 'double' or 'twofold' (equivalent to diplo- / dipl- in English).
二重国籍の人は二つの国の国籍を持っている。
A person with dual nationality holds citizenship of two countries.
二重構造の床は防音性に優れている場合が多い。
Double-layered flooring often has excellent soundproofing properties.
A double eyelid — an eyelid with a crease (also read ふたえ); used to describe eyes with a visible fold.
彼女は元々一重だったが、アイプチで二重にしている。
She originally had single eyelids, but uses glue to create double eyelids.
二重の人は目元がはっきりして見えることが多い。
People with double eyelids often have more distinct-looking eyes.