冬日晒在身上的太阳的暖——天是冷的，光是热的。 The warmth of the sun in winter.
The warmth of the sun in winter. 冬日晒在身上的太阳的暖——天是冷的，光是热的。
词源etymology
拉丁语 apricus（向阳的、晒得着太阳的）→ apricity。 同根的动词 apricate——「晒太阳」——同样只活在最厚的词典里。
Latin apricus (sunny; open to the sun) → apricity. Its sibling verb apricate — to bask in the sun — survives in only the thickest dictionaries, same as it.
背景the story
1623 年，Henry Cockeram 把它收进《The English Dictionarie》——最早的英语词典之一。 然后，就再没有人用过它。
OED 里它的书证只有 Cockeram 这一条，标着 obsolete；现代词典一本都没收。 一个只在词典里活了一辈子的词——恰是 sonder 的镜像：sonder 被无数人使用而词典不收， apricity 被词典收了四百年而无人使用。这几年每到冬天，它都会在社交网络上被「出土」一轮， 晒一晒，然后又躺回去。
In 1623, Henry Cockeram entered it in The English Dictionarie — one of the earliest English dictionaries. And then, nobody ever used it.
The OED’s evidence for it begins and ends with Cockeram, marked obsolete; no modern dictionary carries it. A word that has lived its whole life inside dictionaries — the exact mirror of sonder: sonder is used by thousands and admitted by none, apricity admitted for four hundred years and used by no one. Lately it gets excavated on social media every winter, takes a little sun, and lies back down.
中文里的邻居neighbors in chinese
北方话里有个正好的词：「晒暖儿」——冬天蹲在墙根晒太阳。 意思严丝合缝，气质却正好对调：apricity 是书房里的拉丁文，「晒暖儿」是胡同里的烟火气。 谁高谁低，还真说不好。
Northern colloquial Chinese has the exact word: 晒暖儿 — squatting against a sunny wall in winter, soaking up the warmth. A perfect semantic fit with the registers swapped: apricity is study-room Latin, 晒暖儿 is alleyway smoke-and-noise. Which one is the finer word is genuinely hard to say.
She moved her chair twice around the courtyard, chasing apricity like a cat. 自拟例句 our own example, not a quotation January's one mercy is apricity — cold air, warm shoulders. 自拟例句 our own example, not a quotation 严格说是词典词（OED），实际上是文物——正式写作里用它，读者查不到的概率比 sonder 还高。 当谈资、当收藏，别当词汇。
Technically a dictionary word (OED); in practice, an artifact. Use it in formal prose and your reader is even less likely to find it than sonder. Keep it as trivia, as a collectible — not as vocabulary.