Hence The juice or fluid the presence of which in anything is characteristic of a healthy, fresh, or vigorous condition; blood, A quarryman's name for rock which is partially decayed and which exhibits this quality by iron stains and other discolorations. It is usually thrown away, The juice of plants of any kind, especially the ascending and descending juices or circulating fluid essential to nutrition, intransitive verb_ To undermine the foundations of (a fortification), To dig a sap, To proceed by mining, or by secretly undermining; to execute saps, transitive verb_ To subvert by digging or wearing away; to mine; to undermine; to destroy the foundation of, To make unstable or infirm; to unsettle; to weaken, military To pierce with saps, verb_ To make unstable or infirm; to unsettle; to weaken