"I couldn't get across the message"
"He put over the idea very well"
become clear or enter one's consciousness or emotions;
"It dawned on him that she had betrayed him"
"she was penetrated with sorrow"
travel across or pass over;
"The caravan covered almost 100 miles each day"
- The bridge was blown up, so we couldn't get across.
- The bridge was destroyed so we couldn't get across (ie cross) the river.