steadiest

/S T EH1 D IY0 AH0 S T/
adjective
  1. 1

    Firm in standing or position; not tottering or shaking; fixed; firm.

    โ€œHold the ladder steady while I go up.โ€

  2. 2

    Constant in feeling, purpose, or pursuit; not fickle, changeable, or wavering; not easily moved or persuaded to alter a purpose; resolute.

    โ€œa man steady in his principles, in his purpose, or in the pursuit of an objectโ€

  3. 3

    Smooth and not bumpy or with obstructions.

    โ€œa steady rideโ€

  4. 4

    Regular and even.

    โ€œthe steady course of the Sun;โ€ƒ a steady breeze of windโ€

  5. 5

    Slow.

Source: https://en.wiktionary.org/wiki/steadiest, https://en.wiktionary.org/wiki/steady