improbar

Spanish

Etymology

Etymology tree

Proto-Indo-European *né

Proto-Indo-European *n̥-

Proto-Italic *n̥-

Latin in- (not)

Proto-Indo-European *per-der.?

Proto-Indo-European *per-der.?

Proto-Indo-European *pér

Proto-Indo-European *-o

Proto-Indo-European *pró

Proto-Indo-European *pro-

Proto-Indo-European *bʰuH-

Proto-Indo-European *-wós

Proto-Indo-European *probʰHwós

Proto-Italic *proβwos

Proto-Italic *proβos

Proto-Indo-European *-h₂

Proto-Indo-European *-éh₂

Proto-Indo-European *-yéti

Proto-Indo-European *-eh₂yéti

Proto-Indo-European *-h₂tiinflu.

Proto-Italic *-ājō

Proto-Italic *-āō

Proto-Italic *proβāō

Latin probō

Latin improbāreder.

Spanish improbar

Derived from Latin improbāre.

Pronunciation

• IPA^(key): /impɾoˈbaɾ/ [ĩm.pɾoˈβ̞aɾ]
• Rhymes: -aɾ
• Syllabification: im‧pro‧bar

Verb

improbar (first-person singular present impruebo, first-person singular preterite improbé, past participle improbado)

1. to disapprove

Conjugation

    Conjugation of improbar (o-ue alternation) (See Appendix:Spanish verbs)

infinitive			improbar
gerund			improbando
past participle				masculine		feminine
		singular		improbado		improbada
		plural		improbados		improbadas
		singular			plural
		1st person	2nd person	3rd person	1st person	2nd person	3rd person
indicative		yo	tú vos	él/ella/ello usted	nosotros nosotras	vosotros vosotras	ellos/ellas ustedes
	present	impruebo	impruebastú improbásvos	imprueba	improbamos	improbáis	imprueban
	imperfect	improbaba	improbabas	improbaba	improbábamos	improbabais	improbaban
	preterite	improbé	improbaste	improbó	improbamos	improbasteis	improbaron
	future	improbaré	improbarás	improbará	improbaremos	improbaréis	improbarán
	conditional	improbaría	improbarías	improbaría	improbaríamos	improbaríais	improbarían
subjunctive		yo	tú vos	él/ella/ello usted	nosotros nosotras	vosotros vosotras	ellos/ellas ustedes
	present	impruebe	impruebestú improbésvos2	impruebe	improbemos	improbéis	imprueben
	imperfect (ra)	improbara	improbaras	improbara	improbáramos	improbarais	improbaran
	imperfect (se)	improbase	improbases	improbase	improbásemos	improbaseis	improbasen
	future1	improbare	improbares	improbare	improbáremos	improbareis	improbaren
imperative		—	tú vos	usted	nosotros nosotras	vosotros vosotras	ustedes
	affirmative		impruebatú improbávos	impruebe	improbemos	improbad	imprueben
	negative		no impruebes	no impruebe	no improbemos	no improbéis	no imprueben

¹Rare; now chiefly used in legal language.
²Argentine and Uruguayan voseo prefers the tuteo-form for the present subjunctive.

Further reading

• “improbar”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), 24th edition, Royal Spanish Academy [Spanish: Real Academia Española], 30 October 2026