И. В. Арнольд лексикология современного английского языка Издание

ashtray __ hairbrush __ paperknife a tray for ashes a brush for hair a knife for paper
Such correlations are very helpful in showing similarity and difference of meaning in morphologically similar pairs. Consider, for example, the following:
bookselling _ bookbinding bookmaking sell books bind books make books
A bookmaker is not one who makes books but a person who makes a living by taking bets on horse-races. The method may be used to distinguish unmotivated compounds.
Compounds that conform to grammatical patterns current in present-day English are termed syntactic compounds, e. g. seashore. If they fail to do so, they may be called asyntactic, e. g. baby-sitting.
In the first type the functional meaning and distribution coincide with those of the elements of a free phrase, no matter how different their lexical meaning may be. This may be shown by substituting a corresponding compound for a free phrase.
Compare: A slow coach moves slowly. A slow-coach moves slowly.
Though different in meaning, both sentences are grammatically correct.
In these compounds the two constituent elements are clearly the determinant and the determinatum. Such compounds receive the name of endocentric compounds.
There are, however, other compounds where the determinatum is not expressed but implied. A killjoy ‘a person who throws gloom over social enjoyment’ is neither ‘joy’ nor ‘kill’ and the case is different from the slow-coach above, as in the corresponding free phrase ‘kill’ is a verb in the Imperative Mood and ‘joy’ is a noun on which the action of this verb is directed. A phrase of this type cannot be used predicatively, whereas the predicative function is typical of the compound killjoy. The essential part of the determinatum is obviously missing, it is implied and understood but not formally expressed. H. Marchand considers these words as having a zero determinatum stem and calls such compounds exocentric, e. g. cut-throat, dare-devil, scarecrow because their determinatum lies outside as opposed to the endocentric: sun-beam, blackboard, slow-coach, wall-flower.
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The absence of formal determinatum results in the tendency to append the inflectional ending to the element that happens to be final. Thus, brothers-in-law, but in-laws. E. g.: Laws banning unofficial strikes, go-slows and slow-downs ("Morning Star").