aptness

1. (countable, uncountable)Suitability; the quality of being apt or suitable.

   Eignung

   приго́дностьprigódnostʹ

2. (countable, uncountable)Disposition of the mind; propensity.

   the aptness of men to follow example

   a disposition to behave in a certain way

3. (countable, uncountable)Speed or readiness in learning; docility.

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

4. (countable, uncountable)Proneness; tendency.

   the aptness of iron to rust

regular