You searched for: “most constant
constant (adjective); more constant, most constant
1. Regarding something that stays the same and does not change: She drove at a constant speed of 50 mph along the long boulevard.
2. Pertaining to something which is continual or persistent: The noise from the neighbor's garden party was certainly constant, even into the night!
3. Characterizing a person who is faithful and dependable: Even after all the years, Bob always remained a constant friend who was totally trustworthy and reliable.