From tempestās (“time, season”) +‎ -īvus.

• (Classical Latin) IPA^(key): [tɛm.pɛsˈtiː.wʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [tem.pesˈtiː.vus]

tempestīvus (feminine tempestīva, neuter tempestīvum); first/second-declension adjective

1. timely, opportune, fitting
2. early, betimes
   • 106 BCE – 43 BCE, Cicero, Cato Maior de Senectute 14.46:

     Ego vērō propter sermōnis dēlectātiōnem tempestīvīs quoque convīviīs dēlector […].

     Truly I, due to my enjoyment of conversation, am delighted even by early banquets.

3. (of a person) mature

First/second-declension adjective.

• (antonym(s) of “timely, opportune”): intempestīvus

• temperō
• tempestās
• tempus

• → Catalan: tempestiu
• → English: tempestive
• → Italian: tempestivo
• → Portuguese: tempestivo
• → Spanish: tempestivo

• “tempestivus”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “tempestivus”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• “tempestivus”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• Carl Meißner; Henry William Auden (1894), Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • a repast which begins in good time: convivia tempestiva (Arch. 6. 13)