Meanings
adverbcostfully (comparative more costfully, superlative most costfully)
comparative more costfully · superlative most costfully
- At high expenditure or cost
Origin
- Middle Englishcostfully
- Englishcostfully
From Middle English costfully, equivalent to costful + -ly.
More words from Middle English
Full word history & related roots →Cite this entry
APA
costfully. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/costfully
MLA
“costfully.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/costfully. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “costfully,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/costfully.
Source: costfully on Wiktionary, CC BY-SA 4.0.