seria
seria is a Latin form of serius, meaning “serious; (serio) seriously”. It is the nominative plural neuter adjective or vocative plural neuter adjective or accusative plural neuter adjective or ablative singular feminine adjective.
Found 56 times in the Latin texts on Socratos.
Where it is used
Cicero, Philippicae 2.7: … oquia absentium? quam multa ioca solent esse in epistulis quae, prolata si sint, inepta videantur, quam multa seria neque tamen ullo modo divolganda!
Martial, Epigrammata 5.16.1: Seria cum possim, quod delectantia malo
All forms of serius (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.