Yet, sap in its other incarnations is, according to Webster's Unabridged 1913, of uncertain origin. Any thing else in the OED?


Sap \Sap\, n. [AS. s[ae]p; akin to OHG. saf, G. saft, Icel.
safi; of uncertain origin; possibly akin to L. sapere to
taste, to be wise, sapa must or new wine boiled thick. Cf.
Sapid, Sapient.]
1. The juice of plants of any kind, especially the ascending
and descending juices or circulating fluid essential to
nutrition.

Note: The ascending is the crude sap, the assimilation of
which takes place in the leaves, when it becomes the
elaborated sap suited to the growth of the plant.

2. The sapwood, or alburnum, of a tree.

3. A simpleton; a saphead; a milksop. [Slang]


The Only WO'N!