ingressive

About 0.03 uses per million words.

Meaning

adjective Going or directed inward, entering.
adjective Open to entry or examination.
The chances that your Internet activity is being monitored are low, despite the ingressive nature of the modern Internet environment.
adjective Uttered by drawing air inward through the mouth or nose.
adjective Aspectually indicating that an action is about to be entered or is in the process of being entered.
adjective Being a source or channel through which water enters or once entered an area.
This spring is the ingressive source of the water that flows through the cave.
noun A speech sound in which the air stream is created by drawing air in through the mouth or nose.