This is the 7780th most frequent Japanese word.
吊るす
"吊るす" means "to hang or suspend."
Here '吊るしている' describes the act of hanging objects such as clothing on a line or hanger.
彼女はベランダに服を吊るしている。
She is hanging clothes on the balcony.
In this sentence, '吊るして飾った' refers to suspending the painting to showcase it.
展示会で彼は自作の絵を壁に吊るして飾った。
At the exhibition, he hung his self-made painting on the wall to display it.
The word '吊るしています' is used to denote hanging the shelf as a stable structure from above.