serius

Borrowed from English serious and Dutch serieus, from Medieval Latin sēriōsus, an extension of Latin sērius (“grave, earnest, serious”), from Proto-Indo-European *swer- (“heavy”).

• IPA^(key): (Standard, English-influenced) /sə.ˈri.ʊs/, (Dutch-influenced) /sɛ.ˈri.ʊs/
• Rhymes: -ʊs, -s
• Hyphenation: sê‧ri‧us

sêrius

1. serious

• “serius” in Kamus Besar Bahasa Indonesia, Jakarta: Language Development and Fostering Agency — Ministry of Education, Culture, Research, and Technology of the Republic Indonesia, 2016.

Somewhat disputed. There are two main competing hypotheses:

• Usually held to derive via Proto-Italic *swerjos from Proto-Indo-European *swer-yo-s, from the root *swer- (“heavy”). Cognate with Old English swǣr (“heavy, grave, grievous”), German schwer (“hard, difficult, heavy”), Lithuanian sverti (“to weigh, balance”), svarùs (“heavy”). More at sweer.
• According to De Vaan, rather from Proto-Italic *sērjos, from Proto-Indo-European *seh₁-ro-s + *-yo-, from an uncertain root *seh₁- (“to go slowly?”) (cf. sēgnis (“slow, tardy, sluggish, lazy”)). In this case, equivalent to sērus (“slow, tardy”) +‎ -ius.

• (Classical) IPA^(key): /ˈseː.ri.us/, [ˈs̠eːriʊs̠]
• (Ecclesiastical) IPA^(key): /ˈse.ri.us/, [ˈsɛːrius]

sērius (feminine sēria, neuter sērium); first/second-declension adjective

1. grave, earnest, serious

First/second-declension adjective.

• sēriōsus

sērius

1. comparative degree of sērus

• De Vaan, Michiel (2008), “sērius”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 556
• “serius”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “serius”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• serius in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• serius in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
• Carl Meißner; Henry William Auden (1894) Latin Phrase-Book‎, London: Macmillan and Co.
  • two days late: biduo serius
    
  • (ambiguous) to say in earnest..: serio dicere (Plaut. Bacch. 1. 1. 42)
    
• serious in The Century Dictionary, New York, N.Y.: The Century Co., 1911