sap
verb [ T ] uk/sæp/ us/sæp/ -pp-
（尤指经过一段很长的时间）使伤元气；削弱；使耗尽
to make someone weaker or take away strength or an important quality from someone, especially over a long period of time
Constant criticism saps you of your confidence. 不间断地有人批评会消磨信心。
Taking care of her dying mother had sapped all her energy. 照顾临终的母亲耗尽了她的全部精力。
sap
noun uk/sæp/ us/sæp/
(LIQUID)
[ U ]（植物运送养分的）汁，液
the liquid that carries food to all parts of a plant
Maple syrup is obtained from the sap of the sugar maple tree. 槭糖浆是从糖槭树的树汁中提取的。
(PERSON)
[ C ] mainly US informal笨蛋，傻瓜；容易上当的人
a stupid person who can easily be tricked or persuaded to do something
He'll lie around and let some other poor sap do all the work. 他会懒洋洋地无所事事，把工作都丢给别的傻瓜。
Idiom
the sap is risingidiom UK humorous （对恋爱和性）兴致勃勃起来，来了劲头
an expression used to mean that people start to have more energy and feel more interested in love and sex, for example in spring