also: かれこれ
adverb, pronoun
this and that; one thing or another; various things
Used to refer to multiple unspecified things or matters, often in the context of thinking, worrying, or talking about various things.
あれこれ考えすぎて眠れなかった。
I couldn't sleep because I was thinking about this and that too much.
彼はあれこれと文句を言っている。
He's complaining about one thing or another.
adverb
around; about; roughly; nearly
Only with reading かれこれ
Used with quantities or time to indicate approximation; restricted to the reading かれこれ.
かれこれ10年、日本に住んでいる。
I've been living in Japan for about 10 years.
会議はかれこれ2時間続いている。
The meeting has been going on for nearly two hours.