Spanish(Indo‑European, Romance)

Mismatch: word class : adverb/noun

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In Spanish, there are adverbs which behave morphologically as plural o-stem nouns. Compare the forms of the adverb lejos 'far' with those of th noun libro 'book':

singular	plural		singular diminutive	plural diminutive
libro	libro-s		libr-it-o	libr-it-o-s	'book'
	lej-o-s			lej-it-o-s	'far'

(Bermúdez-Otero, forthcoming)

The position of the diminutive suffix -it- in lejitos shows that, morphologically, -o- and -s are separable elements that are treated in the same way as the corresponding segments in the noun. Note that this contrasts with the behaviour of nouns where a final -Vs sequence is treated as part of the stem:

singular	plural		singular diminutive	plural diminutive
virus	virus		virus-it-o	virus-it-o-s
'book'	'books'		'little book'	'little books'

(Bermúdez-Otero, forthcoming)

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References

Bermúdez-Otero, Ricardo. Forthcoming. Morphological structure and phonological domains in Spanish denominal derivation. In: Sonia Colina and Fernando Martínez-Gil (eds) Optimality-theoretic studies in Spanish phonology. Amsterdam: John Benjamins.