Meanings
adjectivespeedful (comparative more speedful, superlative most speedful)
comparative more speedful · superlative most speedful
- archaicSuccessful, effectual, efficient.
Synonyms & antonyms
Opposite
Origin
- Middle Englishspeedful
- Englishspeedful
From Middle English speedful, spedeful, spedful (“successful, prosperous”), equivalent to speed + -ful.
More words from Middle English
Full word history & related roots →Cite this entry
APA
speedful. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/speedful
MLA
“speedful.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/speedful. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “speedful,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/speedful.
Source: speedful on Wiktionary, CC BY-SA 4.0.