is similar to
not liable to fluctuate or especially to fall
"stocks are still firm"
is similar to
lasting a long time without change
"a lasting relationship"
is similar to
(chemistry, physics, biology) resistant to change
is similar to
made stable or firm
see also
steadfast in purpose or devotion or affection
"a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"
see also
continuing or enduring without marked change in status or condition or place
"permanent secretary to the president"; "permanent address"; "literature of permanent value"
see also
not subject to change or variation especially in behavior
"a steady beat"; "a steady job"; "a steady breeze"; "a steady increase"; "a good steady ballplayer"