constant

a quantity that does not vary

a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"

unvarying in nature; "maintained a constant temperature"; "principles of unvarying validity"

steadfast in purpose or devotion or affection; "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"

uninterrupted in time and indefinitely long continuing; "the ceaseless thunder of surf"; "in constant pain"; "night and day we live with the incessant noise of the city"; "the never-ending search for happiness"; "the perpetual struggle to maintain standards in a democracy"; "man's unceasing warfare with drought and isolation"; "unremitting demands of hunger"