tree (n.)

古英语 treotreow "树"(也有"木材、木头、梁、原木、木桩"),来自于原日耳曼语 *trewam (也是古弗里斯兰语 tre 、古撒克逊语 trio 、古北欧语 tre 、哥特语 triu "树"的源头),来自于PIE *drew-o- ,是根 *deru- "要牢固、坚实、坚定"的后缀变体形式,有专门的意义"木头、树",派生词指木头做的物体。

The line which divides trees from shrubs is largely arbitrary, and dependent upon habit rather than size, the tree having a single trunk usually unbranched for some distance above the ground, while a shrub has usually several stems from the same root and each without a proper trunk. [Century Dictionary]

原意为"橡树"的词在"树"的意义上的广泛使用,可能反映了橡树对古代印欧人的重要性。在古英语和中英语中也有"木头做的东西",特别是十字架的十字架和绞刑架(如 Tyburn tree ,伦敦郊外著名的绞刑架)。中古英语也有复数 treen ,形容词 treen (古英语 treowen "树的,木的")。荷兰语 boom ,德语 Baum ,"树"的惯用词,见 beam (n.)。意为"马鞍的框架",出自1530年代。意思是"以树的形式代表家庭关系"是从14世纪开始的。 Tree-hugger ,对"环保主义者"的蔑视是由1989年证明的。

Minc'd Pyes do not grow upon every tree,
But search the Ovens for them, and there they be.
["Poor Robin," Almanack, 1669]

tree (v.)

"追上一棵树",1700年,出自 tree (n.)。意为"取树形",出自1884年。相关链接: Treed ; treeing

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Definitions of tree from WordNet
tree (v.)
force a person or an animal into a position from which he cannot escape;
Synonyms: corner
tree (v.)
plant with trees;
this lot should be treed so that the house will be shaded in summer
tree (v.)
chase an animal up a tree;
her dog likes to tree squirrels
the hunters treed the bear with dogs and killed it
tree (v.)
stretch (a shoe) on a shoetree;
Synonyms: shoetree
tree (n.)
a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms;
tree (n.)
a figure that branches from a single root;
genealogical tree
Synonyms: tree diagram
Tree (n.)
English actor and theatrical producer noted for his lavish productions of Shakespeare (1853-1917);
Synonyms: Sir Herbert Beerbohm Tree