The stairs were still carpetless, and on the way up to her room she was arrested on the landing by an encroaching tide of soapsuds.
Lily considered with interest the expression of their faces: the girl’s turned toward her companion’s like an empty plate held up to be filled, while the man lounging at her side already betrayed the encroaching boredom which would presently crack the thin veneer of his smile.
There are no more uses of "encroach" in the book.
Show samples from other sources
After awhile, the others dragged mattresses and blankets into the room and made a nest around me, and we packed together for warmth against the encroaching chill.
Ransom Riggs -- Hollow City
But over the summer his encroaching dementia had taken a cruel twist.
Ransom Riggs -- Miss Peregrine’s Home for Peculiar Children