Sap

1. n. A simpleton; a saphead; a milksop.
2. n. The juice of plants of any kind, especially the ascending and descending juices or circulating fluid essential to nutrition.
3. n. The sapwood, or alburnum, of a tree.
4. v. t. To make unstable or infirm; to unsettle; to weaken.
5. v. i. To proceed by mining, or by secretly undermining; to execute saps.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.