the juice or vital circulating fluid of a plant, esp. of a woody plant.

any vital body fluid.

energy; vitality.

sapwood.

Slang . a fool; dupe.

Metallurgy . soft metal at the core of a bar of blister steel.

to drain the sap from.

verb

build , help , increase , put in , strengthen

noun

chump , dolt , dupe , fool , idiot , jerk , nitwit , patsy * , pigeon * , simpleton , sucker , weakling , butt , gull , lamb , pushover , victim

verb

attenuate , bleed , blunt , cripple , debilitate , deplete , destroy , devitalize , disable , drain , enervate , enfeeble , erode , exhaust , impair , prostrate , rob , ruin , subvert , undermine , vitiate , wear down , wreck , undo , unnerve , weaken , impoverish , use up , mine , tire , unsettle