aquello

Spanish

From Vulgar Latin *eccum illum, neuter singular of *eccum ille.

IPA^(key): /aˈkeʝo/ [aˈke.ʝo] (most of Spain and Latin America)
IPA^(key): /aˈkeʎo/ [aˈke.ʎo] (rural northern Spain, Andes Mountains, Paraguay, Philippines)
IPA^(key): /aˈkeʃo/ [aˈke.ʃo] (Buenos Aires and environs)
IPA^(key): /aˈkeʒo/ [aˈke.ʒo] (elsewhere in Argentina and Uruguay)

aquello

aquello

				Nominative	Disjunctive	Accusative	Dative	Comitative
First-person	Singular			yo	mí	me		conmigo
	Plural	Masculine¹		nosotros		nos		—
	Plural	Feminine		nosotras		nos		—
Second-person	Singular	Tuteo		tú	tí	te		contigo
		Voseo		vos	—	te
		Formal²	Masculine¹	usted		le, se³	lo
		Formal²	Feminine	usted		le, se³	la
	Plural	Familiar⁴	Masculine¹	vosotros		os
		Familiar⁴	Feminine	vosotras		os
		Formal/general²	Masculine¹	ustedes		les, se³	los
		Formal/general²	Feminine	ustedes		les, se³	las
Third-person	Singular	Masculine¹		él		le, se³	lo
		Feminine		ella			la
		Neuter		ello⁵			lo
	Plural	Masculine¹		ellos		les, se³	los
	Plural	Feminine		ellas		les, se³	las
	Reflexive			—	sí	se		consigo

Like other masculine words, masculine pronouns can be used when the gender of the subject is unknown or when the subject is plural and of mixed gender.
Treated as if it were third person for purposes of conjugation and reflexivity.
If le or les precedes lo, la, los, or las in a clause, it is replaced with se (e.g. se lo dije instead of *le lo dije).
Used primarily in Spain.
Used only in rare circumstances.