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No major dictionary that I'm aware of lists "eachother" as a word, but I don't understand why. It's a common construction, means something different than "each other", and in common speech it generally gets pronounced differently than "each other" as well, with the two words blurring into eachother.

"They looked at each other block."
"They looked at each other."
"They looked at eachother."

To my eye, the first and third make syntactic sense, while the second looks like a sentence fragment.

So why isn't it acceptable as a single word? By all the logic I can see, it functions as one already. I realize this is more of a rant than a question, but I would welcome some grammarian feedback on this issue if there's any to give.
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Hello, Zeal,

What a fine coincidence! Earlier today I learned something new about each other, and here you've asked a question to which my new knowledge applies.

But first, the instances of each other in your second and third examples are reciprocal pronouns. The two words go together as one reciprocal-pronoun unit. I believe that's why you feel them to be as one. I, too, feel them to be as one, though I have never, if memory serves, seen each other spelled as one word in high-quality published writing.

Each other is not a reciprocal pronoun in your first example. There needs to be a slight pause between each and other; otherwise each other would be understood to apply to they rather than to block, which I assume you are using as a noun (blocks of wood, blocks of a town, etc.).

As to why each other in the second and third sentences are spelled as two words, I learned today that, historically, the preposition in such constructions was placed between the two words. The following passage is from Otto Jespersen's The Philosophy of Grammar (1924), which I ordered earlier this week and started reading today:
"The distinction between a formula and a free combination also affects word-order. One example may suffice : so long as some+thing is a free combination of two elements felt as such, another adjective may be inserted in the usual way : some good thing. But as soon as something has become a fixed formula, it is inseparable, and the adjective has to follow : something good. Compare also the difference between the old ' They turned each to other ' and the modern ' they turned to each other '".

-- Jespersen, Otto. The Philosophy of Grammar. Henry Holt and Company: New York, 1924.
Historically, then, your second example might have read as follows. I'm not sure whether a comma would have been added or not:
  • They looked each at (the) other.
  • They looked, each at (the) other.
Perhaps each other, in its reciprocal pronoun usage, is on its way to being spelled as a single word. If so, I would imagine that text-messaging culture is assisting in that development.

Last edited by David, Moderator

I think that makes more sense now, at least in how it came to be that way. I can't say I've ever actually seen it as one word either, but my fingers insist otherwise. I didn't even realize it was wrong until my spellchecker started flagging it a year ago, and it's been a major battle trying to retrain myself. And I think I'm about ready to go out on a limb and personally accept it as a word.

The kicker for me is the pronunciation, at least in my region. In "they looked at each other block", there's an accented syllable on "each" and on the first syllable of "other". But when it's used as a reciprocal pronoun as you say, the stress on "each" disappears. When we reconstruct the reciprocal pronoun in its original form, "each to the other", the accent on "each" magically reappears.

That, more than anything, makes the modern construction seem like a single word to me. And given that my fingers came about that space-less spelling naturally, I have to wonder how many other writers have had their "eachothers" edited to "each others". It's idle speculation, I know, but it's kind of a nice thought for me.

Anyway, thank you for your wonderful elucidation of the subject!
Last edited by sonofzeal

I enjoy this conversation. Because I use it so much as one that my iPhone autosuggests eachOther now. 

The reason, that I enjoy one word usage and make it clear that I meant it, is because it feels like a unifying expression. When I write eachOther I am illustrating a feeling/dynamic of recognition of another and connection. “They have loved eachOther for decades...” to me, that is an expression of reciprocity and I find myself resisting the separation of words. 

Its something I ponder often. 

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