名詞 walnut:

1. nut of any of various walnut trees having a wrinkled two-lobed seed with a hard shell
2. hard dark-brown wood of any of various walnut trees; used especially for furniture and paneling
3. any of various trees of the genus Juglans
   同義詞：walnut tree

1. A seed borne within a fruit having a hard shell, as in the peanut, almond, or walnut.
   堅(jiān)果種子生長(zhǎng)在有硬殼的果實(shí)之內(nèi)的種子，如花生、杏或核桃
2. This box is made of walnut.
   這個(gè)箱子是胡桃木做的。

wal.nut

n.（名詞）

Any of several deciduous trees of the genusJuglans, having pinnately compound leaves and a round, sticky outer fruit wall that encloses a nutlike stone with an edible seed.
胡桃：一種屬于胡桃屬 的落葉樹，具有羽狀復(fù)葉及裹住含有可食籽的干果狀果核的圓形多汁的外果襞
The stone or the ridged or corrugated seed of such a tree.
胡桃核（籽）：胡桃樹的果核或突起的或波狀的種籽
The hard, dark brown wood of any of these trees, used for gunstocks and in cabinetwork.
胡桃木：胡桃樹的堅(jiān)硬的、深棕色的木頭，用于制槍托及細(xì)木工家具

來源：
Middle English walnot
中古英語 walnot
from Old English wealhhnutu
源自 古英語 wealhhnutu
wealh [Celt, foreigner]
wealh [凱爾特，外國(guó)人]
hnutu [nut]
hnutu [干果]

【引伸】
wal.nut
adj.（形容詞）