constancy

US /ˈkɑːn.stən.si/
UK /ˈkɑːn.stən.si/
"constancy" picture
1.

the quality of being unchanging or steadfast; faithfulness

:
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Her constancy in friendship was admirable.
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The constancy of the stars in the night sky is a comforting thought.
:
steadfastnessfaithfulnessfidelityloyaltydependabilityreliabilitystabilitypermanenceenduranceperseverance