all sorts of things; a great variety of matters
A yojijukugo meaning a wide range of things or affairs. Often used in formal or literary contexts to emphasize diversity or multitude.
He has knowledge of all sorts of things.
A great variety of issues were discussed at the meeting.
Similar meaning but 諸事万端 emphasizes 'various matters' more concretely, while 千緒万端 has a more literary, abstract nuance of 'innumerable threads'.
A yojijukugo composed of 千 (thousand), 緒 (thread, beginning), 万 (ten thousand), and 端 (edge, tip), literally 'a thousand threads and ten thousand ends', figuratively meaning a vast variety of things. The exact historical derivation is uncertain.