i Register
In some senses, penetrate is marked as figuratively. Watch for register when choosing this word.
ADV
deep, deeply, far
Water slowly penetrated deeply into the soil during the heavy rainfall.
fully, totally
hardly
Her voice hardly penetrated the noise of the crowded restaurant.
quickly
slowly
The bitter truth slowly penetrated her mind as she read the letter again.
easily, readily
The new security system prevents thieves from readily penetrating the building's defenses.
successfully
VERB + PENETRATE
be able to, can/could | be difficult to
seem to
The smell of fresh paint seemed to penetrate every room in the house.
fail to
allow sth to
The thick walls of the old castle were designed to prevent arrows from penetrating.
PREP
into
The knife penetrated into the thick wooden door during the break-in.
through
The needle penetrated through the fabric with a sharp point.
to
The cold air penetrated to the basement despite the sealed windows.