infall

An incursion; an inroad.

A junction; a falling or running together, as of streams; the joining of one road with another.

The inlet or place where water enters a reservoir or basin: generally confined to cases where the water in entering pours or falls in.

The act or process of falling in.

An incursion; an inroad.

The area where water, storm runoff, etc., enters a storm drain.

Movement towards a massive astronomical body under the influence of gravity; especially the process whereby gas falls towards a neutron star or black hole at high speed, forming a plasma

To fall in.

To undergo infall.