名詞 appetite:

1. a feeling of craving something- Granville Hicks
   同義詞：appetency, appetence

1. There's nothing to touch mountain air for giving you an appetite.
   再也沒(méi)有比山間清新的空氣更能促進(jìn)食欲的了。
2. Why don't you go for a walk? It'll give you an appetite for your lunch.
   你怎麼不出去散散步? 散散步午飯時(shí)就有食欲了。
3. The long walk gave him a good appetite.
   長(zhǎng)時(shí)間的走路使他食欲旺盛。
4. She is suffering from lack of appetite.
   她食欲不振。

ap.pe.tite

n.（名詞）
An instinctive physical desire, especially one for food or drink.
食欲：一種本能生理欲望，尤指對(duì)食品或飲料
A strong wish or urge:
強(qiáng)烈的愿望，迫切的要求：
例句：
an appetite for learning.
學(xué)習(xí)的強(qiáng)烈愿望

來(lái)源：
Middle English apetit
中古英語(yǔ) apetit
from Old French
源自 古法語(yǔ)
from Latin appetotus [strong desire] [from past participle of] appetere [to strive after]
源自 拉丁語(yǔ) appetotus [強(qiáng)烈欲望] [] 源自appetere的過(guò)去分詞 [為…奮斗]
ad- [ad-]
ad- [前綴，表示.臨近.]
petere [to seek] * see pet-
petere [尋找，嘗試] *參見(jiàn) pet-

【引伸】
ap.peti.tive