Noun Case > Locative Internal > Hyperessive Case (HSV)
The hyperessive is the exaggerated counterpart of the inessive case. It denotes an area deep within the root. It can typically be translated into English as deep inside of or deep in. It can only be used to refer to physical locations inside of things.
When referring to things which are deep inside of other things, you don’t necessarily always need to use the hyperessive. If the fact that it’s not just inside, but deep inside is not important, then the hyperessive needn’t necessarily be used.
The hyperessive case ending is -avalla.
deep inside the cave
deep inside the tree
deep into the sky
Verbal Derivation Implication
When a hyperessive noun is derived into an action verb, it implies a verb of motion that both begins and ends deep inside of the root of the verb. This can be conceptually translated into English as move deep inside of. The manner of movement is either left unmentioned or clarified with adverbs or additional clauses.
The animals [were still moving] deep inside of the forest.
The fish is/are [swimming around] deep under the water.
And as usual, when a hyperessive noun is derived into a stative verb, it is copulaic/existential.
The creature is deep within the cave.