steadiness

noun
1
the quality of being sensible and reliable
ثبات, استواری, پایداری
2
the fact of being stable and not changing
ثبات, پایداری, استحکام
the steadiness of her gaze
3
the fact of developing, growing, etc. gradually and in an even and regular way
ثبات, پایداری
the steadiness of the price increases