pin-, pino- +

(Greek: a combining form confused between three Greek roots and may mean "hunger", "dirt", or "drink"; and there is one Latin form referring to the "pine tree")

pinocyte, pinocytic, pinocytosis, pinocytotic
The inbibition [drinking]; of liquids by cells; i.e., absorption of liquids by cells; especially, the mechanism by which cells ingest extracellular fluid and its contents.
The process by which cells engulf fluids and solids to form vacuoles, which then move through the cell and discharge their contents from another region of the cell surface.
Any of the small fluid-filled vesicles [a small bladder or sac containing liquid] found in the cytoplasm during pinocytosis.
The treatment of disease by restricting food intake.