adsiduus

• (Classical Latin) IPA^(key): [asˈsɪ.du.ʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [ad̪ˈsiː.d̪u.us]

adsiduus (feminine adsidua, neuter adsiduum, adverb adsiduē); first/second-declension adjective

1. alternative form of assiduus
   • 29 BCE – 19 BCE, Virgil, Aeneid 4.447–448:

     [...] haud secus, adsiduīs hinc atque hinc vōcibus hērōs / tunditur, [...].

     [Like an oak tree in the wind:] hardly otherwise, the hero is being assailed with persistent appeals [from] this way and that, [...].
     (Anna, acting on behalf of Dido, makes repeated emotional pleas to Aeneas.)

First/second-declension adjective.