察

chá
Top: roof 宀, below: sacrifice 祭 (The body 月/肉 is put by hand on the altar 示 as sacrifice)
If a cover (= roof) is over the altar with the sacrificial item, this shall be investigated.

擦

cā
Left: hand 扌, right: investigate 察 (When there is a cover 宀 over the sacrificial 祭 item on the alter 示, it is to be investigated.) [sacrify = 祭 = The body 月/肉 is put by hand on the altar 示 to sacrifice.]
The hand investigates by rubbing.

蔡

cài
Top: plant /grass 艹, bottom: sacrifice 祭 (The body 月/肉 is put by hand on the altar 示 as a sacrifice)
Plants are sacrificed by the family: Cai.

祭

jì
Top: part of body 月 (cf: meat 肉), hand , below: to show 示 (image of an altar with a sacrifice on it)
A body is laid by hand on the altar: as sacrifice.

嚓

chā
Left: mouth 口, right: investigate 察 (When there is a cover 宀 over the sacrificial 祭 item on the alter 示, it is to be investigated.) [祭 = The body 月/肉 is put by hand on the altar 示 as sacrifice]
The mouth must be investigated if it makes cracking sounds.