2.
eh, ni-, -an
to be immersed; ‘religion’ to be baptized by immersion.
This type of baptism is done by some Christian churches. It is not an Islamic rite, but it is mentioned in Kitab Injil , so apparently Jewish people were practicing it when the Injil was written, about two thousand years ago.
[It] is to be immersed once then [it] is to be raised up [straighten up].