LATIN DICTIONARYLexicon Latīnum
verbthird conjugation, suppletive, semi-deponent, no future active participle, irregular long ī

obsolefīō

obsolefīō (present infinitive obsolefierī, perfect active obsolefactus sum)
Classical[ɔp.sɔ.ɫɛˈfiː.oː]Ecclesiastical[ob.so.leˈfiː.o]

Meaning

  1. suppletiveto be degraded, sullied, debased
    […] admonebatque praetores ne paterentur nomen suum commissionibus obsolefieri.[…] he also urged the praetors not to let his name be sullied (or, rendered too common) during theatre speeches.121 CE, Suetonius, De Vita Caesarum, volume Aug.89:
  2. suppletiveto become worn out

Conjugation conjugation 3 deponent future irregular

active indicative
formpresentimperfectfutureperfectpluperfectfut. perfect
1st sg.obsolefīōobsolefīēbamobsolefīam———
2nd sg.obsolefīsobsolefīēbāsobsolefīēs———
3rd sg.obsolefitobsolefīēbatobsolefīet———
1st pl.obsolefīmusobsolefīēbāmusobsolefīēmus———
2nd pl.obsolefītisobsolefīēbātisobsolefīētis———
3rd pl.obsolefīuntobsolefīēbantobsolefīent———
active subjunctive
active subjunctive
formpresentimperfectperfectpluperfect
1st sg.obsolefīamobsolefierem——
2nd sg.obsolefīāsobsolefierēs——
3rd sg.obsolefīatobsolefieret——
1st pl.obsolefīāmusobsolefierēmus——
2nd pl.obsolefīātisobsolefierētis——
3rd pl.obsolefīantobsolefierent——
imperative
imperative
formactivepassive
pres. 2nd sg.obsolefī—
pres. 2nd pl.obsolefīte—
fut. 2nd sg.obsolefītō—
fut. 3rd sg.obsolefītō—
fut. 2nd pl.obsolefītōte—
fut. 3rd pl.obsolefīuntō—
infinitives & participles
infinitives & participles
formactivepassive
present infinitiveobsolefierī—
perfect infinitiveobsolefactum esse—
future infinitiveobsolefactum īrī—
present participleobsolefīēns—
perfect participleobsolefactus—
future participle—obsolefīendus
gerundobsolefīendī, obsolefīendō, obsolefīendumsupineobsolefactum, obsolefactū

Charlton Lewis's shorter dictionary for students: the same scholarship in plain, modern definitions.

obsolefiō —, fierī
1 OL-, to wear out, be spoiled: obsolefiebant dignitatis insignia, became worthless.

Origins

From obsolē(scō) + fīō.

Quick answers

What does obsolefīō mean in Latin?
obsolefīō, a verb, means “to be degraded, sullied, debased; to become worn out”.
What are the principal parts of obsolefīō?
obsolefīō, obsolefierī, obsolefactus sum (third conjugation, suppletive, semi-deponent, no future active participle, irregular long ī).
How do you pronounce obsolefīō?
In classical Latin, [ɔp.sɔ.ɫɛˈfiː.oː]; in ecclesiastical (church) Latin, [ob.so.leˈfiː.o].