apto

See also: aptó and Apto.

English

Noun

apto (uncountable)

1. Clipping of aptophilia

Latin

Etymology

Equivalent to aptus (“suitable, fitting”) +‎ -ō or apiō (“fasten”) +‎ -tō.

Pronunciation

• (Classical Latin) IPA^(key): [ˈap.toː]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈap.to]

Verb

aptō (present infinitive aptāre, perfect active aptāvī, supine aptātum); first conjugation

1. to fasten, fit, apply, adjust
2. to adapt, accommodate, fit
3. to make ready, prepare

Conjugation

   Conjugation of aptō (first conjugation)

indicative		singular						plural
		first		second		third		first		second		third
active	present	aptō		aptās		aptat		aptāmus		aptātis		aptant
	imperfect	aptābam		aptābās		aptābat		aptābāmus		aptābātis		aptābant
	future	aptābō		aptābis		aptābit		aptābimus		aptābitis		aptābunt
	perfect	aptāvī		aptāvistī		aptāvit		aptāvimus		aptāvistis		aptāvērunt, aptāvēre
	pluperfect	aptāveram		aptāverās		aptāverat		aptāverāmus		aptāverātis		aptāverant
	future perfect	aptāverō		aptāveris		aptāverit		aptāverimus		aptāveritis		aptāverint
passive	present	aptor		aptāris, aptāre		aptātur		aptāmur		aptāminī		aptantur
	imperfect	aptābar		aptābāris, aptābāre		aptābātur		aptābāmur		aptābāminī		aptābantur
	future	aptābor		aptāberis, aptābere		aptābitur		aptābimur		aptābiminī		aptābuntur
	perfect	aptātus + present active indicative of sum
	pluperfect	aptātus + imperfect active indicative of sum
	future perfect	aptātus + future active indicative of sum
subjunctive		singular						plural
		first		second		third		first		second		third
active	present	aptem		aptēs		aptet		aptēmus		aptētis		aptent
	imperfect	aptārem		aptārēs		aptāret		aptārēmus		aptārētis		aptārent
	perfect	aptāverim		aptāverīs		aptāverit		aptāverīmus		aptāverītis		aptāverint
	pluperfect	aptāvissem		aptāvissēs		aptāvisset		aptāvissēmus		aptāvissētis		aptāvissent
passive	present	apter		aptēris, aptēre		aptētur		aptēmur		aptēminī		aptentur
	imperfect	aptārer		aptārēris, aptārēre		aptārētur		aptārēmur		aptārēminī		aptārentur
	perfect	aptātus + present active subjunctive of sum
	pluperfect	aptātus + imperfect active subjunctive of sum
imperative		singular						plural
		first		second		third		first		second		third
active	present	—		aptā		—		—		aptāte		—
	future	—		aptātō		aptātō		—		aptātōte		aptantō
passive	present	—		aptāre		—		—		aptāminī		—
	future	—		aptātor		aptātor		—		—		aptantor
non-finite forms		infinitive						participle
		active			passive			active			passive
present		aptāre			aptārī			aptāns			—
future		aptātūrum esse			aptātum īrī			aptātūrus			aptandus
perfect		aptāvisse			aptātum esse			—			aptātus
future perfect		—			aptātum fore			—			—
perfect potential		aptātūrum fuisse			—			—			—
verbal nouns		gerund								supine
		genitive		dative		accusative		ablative		accusative		ablative
		aptandī		aptandō		aptandum		aptandō		aptātum		aptātū

Derived terms

• adaptō
• aptātus
• coaptō

Descendants

• Asturian: atar
• Galician: atar
• Italian: attare, ⇒ riattare
• Portuguese: atar, aptar
• Spanish: atar, aptar

References

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

Portuguese

Etymology 1

Borrowed from Latin aptus, perfect passive participle of apō.

Pronunciation

 

• (Brazil) IPA^(key): /ˈap.tu/, /ˈa.pi.tu/

• (Brazil) IPA^(key): /ˈap.tu/, /ˈa.pi.tu/
  • (Southern Brazil) IPA^(key): /ˈap.to/

• (Portugal) IPA^(key): /ˈa.ptu/

• Hyphenation: ap‧to

Adjective

apto (feminine apta, masculine plural aptos, feminine plural aptas)

1. apt (fitted or qualified to do something)

Related terms

• atar

Noun

apto m (plural aptos)

1. someone who is apt to do something

Etymology 2

Noun

apto m (plural aptos)

1. abbreviation of apartamento

Further reading

• “apto”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2025
• “apto”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2025

Spanish

Etymology

Borrowed from Latin aptus, perfect passive participle of apō.

Pronunciation

• IPA^(key): /ˈabto/ [ˈaβ̞.t̪o]
• Rhymes: -abto
• Syllabification: ap‧to

Adjective

apto (feminine apta, masculine plural aptos, feminine plural aptas)

1. suitable; capable, able; fit

   Synonyms: adecuado, apropiado, conveniente

Derived terms

• aptamente

Related terms

• aptitud
• atar

Verb

apto

1. first-person singular present indicative of aptar

Further reading

• “apto”, 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