诸【zhū】

诸 means "all the" or "the various" and belongs to formal Chinese. It doesn't combine freely with nouns; it lives in a handful of words.

诸位, 诸多, 诸如

诸位 addresses a group politely, in speeches and meetings: "ladies and gentlemen", "all of you". 诸多 is a formal "many" before an abstract noun. 诸如 introduces examples, "such as", and the list usually closes with 等 or 之类.

诸 as "it into"

In a few verbs, 诸 is two old words fused into one sound – 之 "it" and 于 "into, to". The noun after it is where the thing goes: 付诸实施 "put into effect", 付诸行动 "put into action", 诉诸法律 "take to court", 见诸报端 "appear in the papers".

Because 诸 already contains 于, adding another 于 repeats it.

• × 付诸于实施 → 付诸实施

Not a general "all"

For "all the students" or "everyone" in ordinary sentences, use 所有, 各位 or 大家.

• × 诸学生都来了 → 所有学生都来了
• × 诸个人 → 各位 / 大家