aptness

apt +‎ -ness

• IPA^(key): /ˈæptnəs/

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aptness (countable and uncountable, plural aptnesses)

1. suitability; the quality of being apt or suitable
   • 1962 August, G. Freeman Allen, “Traffic control on the Great Northern Line”, in Modern Railways, page 128:

     A regular supply of coking slack is sent from Durham to the Scunthorpe area, in view of its special aptness for steelmaking processes, [...].

2. disposition of the mind; propensity

   the aptness of men to follow example

3. speed or readiness in learning; docility

   An aptness to learn is more observable in some children than in others.

4. proneness; tendency

   the aptness of iron to rust

• “aptness”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• Stepans, pantses, patness, septans