adverb, adverb taking the 'to' particle
Mimetic word for the sound of a bell ringing repeatedly, often with a loud, metallic tone.
鐘がじゃんじゃんと鳴り響いた。
The bell clanged loudly.
adverb
Describes actions done in rapid succession, without pause, or in large amounts. Often used with giving, spending, or producing.
お客さんがじゃんじゃん来る。
Customers keep coming one after another.
じゃんじゃんお金を使ってしまった。
I ended up spending money freely.