inactivity

Etymology

It is formed from English in- (“not”) + activity,^[2][3][4][5] slightly later than inaction and slightly earlier than inactive.^[2] The OED compares French inactivité, recorded from 1726, and the English unactivity.^[2] The noun activity is from Middle French activité, from Medieval Latin activitas, from Latin āctīvus (“active”).^[2][3]

Earliest recorded meaning

Lack of action or effort, sluggishness: 1640, in O. Sedgwick's Christs Counsell,^[2] and the 1640s in Etymonline.^[3]

Semantic evolution

The word has kept its first meaning, which Johnson (1755) gave as "idleness; rest; sluggishness".^[5][2][6] The phrase masterly inactivity, a deliberate and carefully judged lack of action, is attested from 1791, in Mackintosh's Vindiciæ Gallicæ.^[2][3] The Shorter Oxford quotes Calhoun on "a wise and masterly inactivity" as the highest wisdom of a state.^[4]

Timeline

• 1640 – lack of activity, sluggishness.^[2][7]
• 1791 – deliberate, carefully judged lack of action, as in masterly inactivity.^[2][3]

Meanings

Noun

1. The state of being inactive; lack of activity, idleness or sluggishness.^[6][2][4]
2. Deliberate and carefully judged lack of action, as in masterly inactivity.^[2][4]

Related words

• activity
• inactive
• inaction
• active

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ 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
5. ^ a b Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
6. ^ a b Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
7. ^ Kay, Christian; Roberts, Jane; Samuels, Michael; Wotherspoon, Irené, eds. (2009), Historical Thesaurus of the Oxford English Dictionary, Oxford: Oxford University Press; online edition (2024)