is an array of values for the end of form element names.
If any values in this array are at the end of an elemtn name, they will be reomved.
like remove ends, except it is applied to the the begining.
like the other 2, except these values can be found anywhere in the element name.
from you example, it looks like you have for elements with "WADA_RepeatID" at the beginning of the name you wish to remove.
add this to the removebegins array.