buoyancy

Noun
  1. Cheerfulness that bubbles to the surface (synset 107546111)
    is a type of: blitheness, cheerfulness - a feeling of spontaneous good spirits
    same as: perkiness
  2. The property of something weightless and insubstantial (synset 105036129)
    is a type of: lightness, weightlessness - the property of being comparatively small in weight
    same as: airiness
  3. The tendency to float in water or other liquid (synset 104951589)
    is a type of: inclination, tendency - a characteristic likelihood of or natural disposition toward a certain condition or character or effect
  4. Irrepressible liveliness and good spirit (synset 104641316)
    "I admired his buoyancy and persistent good humor"
    is a type of: life, liveliness, spirit, sprightliness - animation and energy in action or expression
    same as: irrepressibility

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