(both)
Ni uno ni otro (neither the one nor the other)
Ni uno (not a single one)
Los otros, los demas (the others)
Mismo (same, self)
Cierto-a,-os-as (a certain, certain)
Cada (each)
*Cada uno, *cada cual (each, each one)
Otro (other, another[108])
Todo (all, everything, every)
Todos (everybody, all)
Poco (little)
Pocos (few)
Unos pocos, unos cuantos (a few)
Mucho-a,-os-as (much, many)
Varios (several)
Cualquiera (_sing._), Cualesquiera (_pl._), (any, whichever)
*Quienquiera (_sing._), quienesquiera (_pl._), (any, whoever, whomever)
*Cualquiera cosa (anything, whatever)
Propio-a, os-as (own, self, same)
Tal (_sing._), tales (_pl._ such a, such)
*Fulano, zutano, mengano (So-and-So)
Cuanto (todo lo que), (all that which)
Cuantos (todos los que), (all those who)
Ninguno (no one, nobody, not any)
*Nada (nothing), *nadie (no one, nobody)
*Quien ... quien, *cual ... cual (some ... some)

[Footnote 108: "Another" is "otro," not "un otro."]

_Cada_ is an adjective only, as--

Cada huelga de obreros dana la industria nacional: Each workmen's strike
injures national industry.

_Alguien, algo, cada, nada, nadie_ are invariable, and the verb
accompanying them is always singular, as--

Alguien hizo un error de pluma: Somebody made a slip of the pen.

Algo es mejor que el dinero, el honor: There is something better than
money, honour.

?Hay algo peor que la ingratitud? Is there anything worse than
ingratitude?

Nada es absolutamente perfecto y nadie es infalible: Nothing is
absolutely perfect and nobody is infallible.

Further difference in meaning between _alguien_ and _alguno_--

_Alguien_ refers to persons only, and cannot be followed by _de_.
_Alguno_ to persons or things, and may be followed by _de_,[109] as--

Alguien _or_ Alguno se ha quejado: Somebody has complained.

Quiere naranjas y melocotones y yo tengo algunos: He wants oranges and
peaches, and I have some.

Alguno de ellos lo hara: Someone amongst them will do it.

The English "any," "anything," are translated by _alguno, alguna cosa
(algo)_ when interrogative; _ninguno, ninguna cosa (nada)_ when
negative; and _cualquiera, cualquiera cosa_ when affirmative, as--

?Quiere V. algun refresco o algo que comer? Do you want any
refreshments[110] or anything to eat?

No quiero ningunos Holandillos: I do not want any Hollands.

Cualquier(a) muchacho de escuela echaria de ver que estas Batistas
Victoria son mas ordinarias: Any schoolboy could