proofful

P3R1O1O1F4F4U1L1

adjective

Serving to prove something.

Scrabble 16
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Meanings

adjectiveproofful (comparative more proofful, superlative most proofful)

comparative more proofful · superlative most proofful

  1. Serving to prove something.

    The production of so many varying but similar phenomena by one cause seems to me more proofful of its efficacy than if the results of its action were more uniform. It shows that under circumstances necessarily varying greatly it acts always in the same direction.

    1870, Charles Handfield Jones, Studies on functional nervous disorders, page 356

Origin

From proof + -ful.

Full word history & related roots →
Cite this entry
APA

proofful. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/proofful

MLA

“proofful.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/proofful. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “proofful,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/proofful.

Source: proofful on Wiktionary, CC BY-SA 4.0.