opaco

See also: opacó and opacò

Galician

Etymology

From Latin opācus (“shaded, shady, dark”).

Adjective

opaco (feminine opaca, masculine plural opacos, feminine plural opacas)

1. opaque (allowing little light to pass through)

Derived terms

• opacamente

Related terms

• opacidade

Further reading

• “opaco”, in Dicionario da Real Academia Galega (in Galician), A Coruña: Royal Galician Academy, 2012–2026

Italian

Etymology

(Possibly borrowed) from Latin opācus (“shaded, shady, dark”), itself of unknown origin.

Pronunciation

• IPA^(key): /oˈpa.ko/
• Rhymes: -ako
• Hyphenation: o‧pà‧co

Adjective

opaco (feminine opaca, masculine plural opachi, feminine plural opache)

1. opaque (allowing little light to pass through)
2. matt
3. dull

Derived terms

• opacamente

Related terms

• bacio
• opacità

Latin

Pronunciation

• (Classical Latin) IPA^(key): [ɔˈpaː.koː]
• (modern Italianate Ecclesiastical) IPA^(key): [oˈpaː.ko]

Etymology 1

See the etymology of the corresponding lemma form.

Adjective

opācō

1. dative/ablative masculine/neuter singular of opācus

Etymology 2

Etymology tree

Latin opācus

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

Latin -ō

Latin opācō

From opācus + -ō.

Verb

opācō (present infinitive opācāre, perfect active opācāvī, supine opācātum); first conjugation

1. to shade, cover with shade
   1. (by extension) to cover
   2. (by extension) to darken

Conjugation

   Conjugation of opācō (first conjugation)

indicative		singular						plural
		first		second		third		first		second		third
active	present	opācō		opācās		opācat		opācāmus		opācātis		opācant
	imperfect	opācābam		opācābās		opācābat		opācābāmus		opācābātis		opācābant
	future	opācābō		opācābis		opācābit		opācābimus		opācābitis		opācābunt
	perfect	opācāvī		opācāvistī		opācāvit		opācāvimus		opācāvistis		opācāvērunt, opācāvēre
	pluperfect	opācāveram		opācāverās		opācāverat		opācāverāmus		opācāverātis		opācāverant
	future perfect	opācāverō		opācāveris		opācāverit		opācāverimus		opācāveritis		opācāverint
passive	present	opācor		opācāris, opācāre		opācātur		opācāmur		opācāminī		opācantur
	imperfect	opācābar		opācābāris, opācābāre		opācābātur		opācābāmur		opācābāminī		opācābantur
	future	opācābor		opācāberis, opācābere		opācābitur		opācābimur		opācābiminī		opācābuntur
	perfect	opācātus + present active indicative of sum
	pluperfect	opācātus + imperfect active indicative of sum
	future perfect	opācātus + future active indicative of sum
subjunctive		singular						plural
		first		second		third		first		second		third
active	present	opācem		opācēs		opācet		opācēmus		opācētis		opācent
	imperfect	opācārem		opācārēs		opācāret		opācārēmus		opācārētis		opācārent
	perfect	opācāverim		opācāverīs		opācāverit		opācāverīmus		opācāverītis		opācāverint
	pluperfect	opācāvissem		opācāvissēs		opācāvisset		opācāvissēmus		opācāvissētis		opācāvissent
passive	present	opācer		opācēris, opācēre		opācētur		opācēmur		opācēminī		opācentur
	imperfect	opācārer		opācārēris, opācārēre		opācārētur		opācārēmur		opācārēminī		opācārentur
	perfect	opācātus + present active subjunctive of sum
	pluperfect	opācātus + imperfect active subjunctive of sum
imperative		singular						plural
		first		second		third		first		second		third
active	present	—		opācā		—		—		opācāte		—
	future	—		opācātō		opācātō		—		opācātōte		opācantō
passive	present	—		opācāre		—		—		opācāminī		—
	future	—		opācātor		opācātor		—		—		opācantor
non-finite forms		infinitive						participle
		active			passive			active			passive
present		opācāre			opācārī			opācāns			—
future		opācātūrum esse			opācātum īrī			opācātūrus			opācandus
perfect		opācāvisse			opācātum esse			—			opācātus
future perfect		—			opācātum fore			—			—
perfect potential		opācātūrum fuisse			—			—			—
verbal nouns		gerund								supine
		genitive		dative		accusative		ablative		accusative		ablative
		opācandī		opācandō		opācandum		opācandō		opācātum		opācātū

Descendants

• English: opaque, opacate

References

• “opaco”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “opaco”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• “opaco”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.

Portuguese

Etymology

Learned borrowing from Latin opācus (“shaded, shady, dark”).

Pronunciation

• (Brazil) IPA^(key): /oˈpa.ku/

• (Portugal) IPA^(key): /ɔˈpa.ku/

• Rhymes: -aku

Adjective

opaco (feminine opaca, masculine plural opacos, feminine plural opacas)

1. opaque (allowing little light to pass through)

Derived terms

• opacamente

Related terms

• opacidade

Further reading

• “opaco”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026
• “opaco”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026

Spanish

Pronunciation

• IPA^(key): /oˈpako/ [oˈpa.ko]
• Rhymes: -ako
• Syllabification: o‧pa‧co

Etymology 1

From Latin opācus (“shaded, shady, dark”).

Adjective

opaco (feminine opaca, masculine plural opacos, feminine plural opacas)

1. opaque (allowing little light to pass through)

Derived terms

• opacamente
• opacar
• opacificar

Related terms

• opacidad

Etymology 2

See the etymology of the corresponding lemma form.

Verb

opaco

1. first-person singular present indicative of opacar

Further reading

• “opaco”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025