various things; all sorts of things; many things
Refers to a collection of diverse items, matters, or people. Often used when listing or summarizing multiple things without specifying each one. The 'large number of people' gloss is a less common extension; the core meaning is 'various things'.
I'm busy with various procedures for the move.
At the meeting, we discussed various issues.
For various reasons, I wasn't able to take part this time.
Let's discuss the costs and everything else together later.
諸事 is a stiff, written term for 'various matters' used in formal notices, while 諸々 is slightly more flexible and can appear in ordinary formal speech too.
Standard kanji spelling; the repetition mark 々 is the most common written form.
Kana spelling; used when the kanji might be unclear or for emphasis.
Full kanji spelling without the repetition mark; less common but still encountered.
Single-character spelling; rare and mostly found in older or formal contexts.
The reading もろもろ is a reduplication of もろ (諸), which itself is of uncertain origin. The kanji 諸 means 'various' or 'many'.