SAP

vt to pierce with saps.

2. sap ·noun a simpleton; a saphead; a milksop.

3. sap ·noun the sapwood, or alburnum, of a tree.

4. sap ·vi to proceed by mining, or by secretly undermining; to execute saps.

5. sap ·vt to make unstable or infirm; to unsettle; to weaken.

6. sap ·noun the juice of plants of any kind, especially the ascending and descending juices or circulating fluid essential to nutrition.

7. sap ·vt to subvert by digging or wearing away; to mine; to undermine; to destroy the foundation of.

8. sap ·noun a narrow ditch or trench made from the foremost parallel toward the glacis or covert way of a besieged place by digging under cover of gabions, ·etc.