出典:Wiktionary
Frequentative of ostendō (“show, expose”), through its past participle, ostentus.
ostentō (present infinitive ostentāre, perfect active ostentāvī, supine ostentātum); first conjugation
1The present passive infinitive in -ier is a rare poetic form which is attested.
2At least one rare poetic syncopated perfect form is attested.