tideless

/ˈtaɪdləs/
adjective
  1. Having no tides; not affected by the regular rise and fall of the sea.
    • The Mediterranean Sea is often described as tideless compared to the Atlantic Ocean.
    • They built their house on a tideless lake, so the water level stayed the same all year.
    • In a tideless bay, the shoreline doesn't change much between morning and evening.
Antonyms
What does "tideless" mean? | whatsthatwordmean | whatsthatwordmean