'sink in' definitions:

Definition of 'sink in'

From: WordNet
verb
Become clear or enter one's consciousness or emotions; "It dawned on him that she had betrayed him"; "she was penetrated with sorrow" [syn: click, get through, dawn, come home, get across, sink in, penetrate, fall into place]
verb
Pass through; "Water permeates sand easily" [syn: percolate, sink in, permeate, filter]

Synonyms of 'sink in'

From: Moby Thesaurus