stalk
n//stɑk//stjälk, stängel, följa, förfölja, stalka
The stem or main axis of a plant.
(mathematics, sheaf theory) Informally, a construction which generalizes that of the notion of the ring of germs of functions near a point to the context of arbitrary sheaves. Formally, given a sheaf \mathcal{F} on a space X, and a point x in X, the direct limit of the sections of F on the open neighborhoods of x ordered by reverse inclusion. See w:Stalk (sheaf) on Wikipedia.Wikipedia
(transitive) To approach slowly and quietly in order not to be discovered when getting closer.
(transitive) To (try to) follow or contact someone constantly, often resulting in harassment.Wp