Various; a variety of — used adjectivally (e.g., いろいろな〜) to indicate many different kinds.
いろいろな意見が出たので、時間をかけて検討しよう。
Many different opinions came up, so let's take time to consider them.
いろいろな国を旅行してみたい。
I want to travel to various countries.
いろいろな色が揃っている絵の具セットを買った。
I bought a paint set that has a variety of colors.
Used adverbially to mean 'variously' or 'in various ways' — indicates actions or states done in many different manners.
いろいろ考えたが、まだ結論は出ない。
I thought about it in various ways, but I still haven't reached a conclusion.
彼はいろいろと手伝ってくれた。
He helped me in various ways.
試験問題は、いろいろな形式で出題される。
Exam questions are given in various formats.
As a noun, refers to various things or 'this and that'; often appears in phrases like '〜のいろいろ'.
旅行のいろいろを友達に話した。
I talked to my friend about various things from the trip.
展示会では、商品のいろいろを紹介していた。
At the exhibition they presented various products.