intendible it is incorrectly written and it should be written as "Entendible" being its meaning:
The word intendible is not very common to use, but its meaning is that it can not be laid, it can not be extended. However, I think that they intended to ask for understandable. This is a qualifying adjective indicating of what is said, listening, writes or reads in understandable, that it can be understood, that is clear.
