1) Firmly 1) In a consistent manner 2) In a reliable manner 3) In a reliable way 4) In a secure manner 5) In a stable unchanging manner 6) In a steadfast way 7) In an unvarying manner 8) So as to be secure 9) Unwaveringly 10) Without swaying 11) Without wavering 
• (adv.) In a stable manner; firmly; fixedly; steadily; as, a government stably settled.
Sta'bly adverb In a stable manner; firmly; fixedly; steadily; as, a government stably settled. 
[adv] - in a stable solid fixed manner 2. [adv] - in a stable unchanging manner
adverb in a stable unchanging manner; `the death rate in Russia has been stably high`