かさねる
kasaneru

Ichidan Verb

1. to pile up; to heap up; to stack up; to put on top of another

Transitive
つくえうえには漫画まんがぼんかさねてあった。
tsukueno ueniwa mangahonga kasanete atta.
The comic books were piled on the desk.
Ichidan Verb

2. to repeat many times over; to go through repeatedly; to accumulate

Transitive
かれ悪事あくじかさねた。
karewa akujio kasaneta.
He committed one crime after another.