σθένος

Perhaps root-cognate with Old English stīþ (“hard, cruel, violent”) (English stith (“stiff, hard”)), or with Proto-Germanic *segaz (“victory”).[1]

σθένος • (sthénos) n (genitive σθένεος or σθένους); third declension

1. strength, might, power

• Greek: σθένος (sthénos)

• σθένος in Liddell & Scott (1940) A Greek–English Lexicon, Oxford: Clarendon Press
• σθένος in Bailly, Anatole (1935) Le Grand Bailly: Dictionnaire grec-français, Paris: Hachette
• σθένος in Cunliffe, Richard J. (1924) A Lexicon of the Homeric Dialect: Expanded Edition, Norman: University of Oklahoma Press, published 1963
• Woodhouse, S. C. (1910) English–Greek Dictionary: A Vocabulary of the Attic Language‎, London: Routledge & Kegan Paul Limited.
  • force idem, page 335.
  • lustiness idem, page 505.
  • might idem, page 528.
  • power idem, page 630.
  • strength idem, page 824.
  • thews idem, page 865.
  • vigour idem, page 952.

From Ancient Greek σθένος (sthénos).

σθένος • (sthénos) n

1. moral or emotional strength, might, power
2. (chemistry) valence, valency
3. (grammar, linguistics) valency (number of grammatical arguments a verb can take)

• σθένος in Λεξικό της κοινής νεοελληνικής [Dictionary of Standard Modern Greek], 1998, by the "Triantafyllidis" Foundation.