knowledgeable

Etymology

It is formed from English knowledge + -able, also spelled knowledgable.^[2][3][4][5] The OED and the Shorter Oxford derive the early, obsolete sense "recognizable" from the verb, Middle English knoulechen (“to acknowledge, later to recognize”), and the modern sense from the noun;^[2][6][4] Etymonline calls the modern sense probably a new formation.^[4] According to the OED, it was first used in “knowledgeable woman” and “knowledgeable man”, after Irish bean feasa (“woman of knowledge”) and fear feasa (“man of knowledge”), and may have been formed so that the Irish construction, with the genitive of fios (“knowledge”) after the noun, could be rendered by an adjective before it.^[2] The OED compares the earlier knowable and knowledged.^[2]

Earliest recorded meaning

Capable of being perceived or recognized; recognizable, distinctive: first in the Kalender of Shepardes (about 1518), used until 1619.^[2][7] Etymonline dates this sense to about 1600 and the Shorter Oxford to the early 17th century.^[4][6]

Semantic evolution

The modern sense, "having or showing knowledge, well-informed", began in Irish English: the OED's first quotation is from 1825, in J. and M. Banim's Tales by the O'Hara Family,^[2][7] and Merriam-Webster also gives 1825,^[3] while Etymonline dates it to 1829.^[4] The sense "aware of", chiefly American, is recorded from 1911.^[2] Dictionary.com dates the word to 1600–10.^[5]

Timeline

• c. 1518 – recognizable, distinctive (obsolete after 1619).^[2][7]
• 1825 – possessing or showing knowledge, well-informed (originally Irish English).^[2][3]
• 1829 – the modern sense, according to Etymonline.^[4]
• 1911 – chiefly in the US, aware or cognizant of something.^[2]

Meanings

Adjective

1. Having or showing much knowledge; well-informed or intelligent: a knowledgeable guide to the city's history.^[3][8][2]
2. (chiefly US) Aware or cognizant of something.^[2][6]
3. (obsolete, 1518–1619) Recognizable; distinctive.^[2][6]

Word family

• knowledgeability
• knowledgeably
• knowledgeableness

Related words

• knowledge
• know
• knowable

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
6. ^ a b c d Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
7. ^ a b c Kay, Christian; Roberts, Jane; Samuels, Michael; Wotherspoon, Irené, eds. (2009), Historical Thesaurus of the Oxford English Dictionary, Oxford: Oxford University Press; online edition (2024)
8. ^ Collins English Dictionary (2023), Glasgow: HarperCollins