Meanings
nounspeedworthiness (uncountable)
- rareuncountableThe ability to travel at high speed.
The "Merchant Navy" class locomotives have lost none of their speedworthiness in the extensive rebuilding and this was certainly a good example of their prowess.
1959 October 29, O. S. Nock, “British Locomotive Practice and Performance”, in Railway Magazine, page 705
Origin
From speed + worthiness, or speedworthy + -ness.
Full word history & related roots →Cite this entry
APA
speedworthiness. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/speedworthiness
MLA
“speedworthiness.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/speedworthiness. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “speedworthiness,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/speedworthiness.
Source: speedworthiness on Wiktionary, CC BY-SA 4.0.