закосне́лость

nounfeminineinanimateuncountablenoun in -ь

1.
ossification (of outlook), rigidity, stagnation, inertness
Закосне́лость мышле́ния меша́ет переме́нам.
Rigidity of thinking stands in the way of change.
Usually of thinking, habits or institutions that refuse to develop.
2.
stubbornness, impenitence, incorrigibility
Его закосне́лость во лжи всех поражала.
His impenitent persistence in lying astonished everyone.
Of a person who persists in vice or error and will not be corrected.

Examples

Эта закоснелость взглядов удивила всех коллег.
This rigidity of opinion astonished all his colleagues.
Мы боролись с закоснелостью старых привычек.
We fought against the rigidity of old habits.
Его закоснелость мешала принимать новые идеи.
His stubbornness made it difficult for him to accept new ideas.