everything; all things; all matters
A yojijukugo meaning every possible thing or affair, often used in formal or emphatic contexts.
万事万端、準備は整った。
Everything is ready.
彼は万事万端に気を配る人だ。
He is a person who pays attention to every single detail.
A yojijukugo composed of 万事 (all things) and 万端 (all matters), both meaning 'everything', creating an emphatic expression.