accross

As an adjective crosswise is

crossing; lying across.

As an adverb crosswise is

transversely; so as to lie across.

Accross is likely misspelled.

Accross has no English definition.

As a preposition through

is from one side of an opening to the other.

As an adjective through

is passing from one side of an object to the other.

As an adverb through

is from one side to the other by way of the interior.

As a noun through

is a large slab of stone laid on a tomb.