Antonyms of adj afloat

3 senses of afloat

Sense 1
adrift (predicate), afloat (predicate), aimless, directionless, planless, rudderless, undirected -- (aimlessly drifting)

INDIRECT (VIA purposeless) -> purposeful -- (serving as or indicating the existence of a purpose or goal)

Sense 2
afloat (predicate) (vs. aground) -- (borne on the water; floating)

aground(predicate) (vs. afloat) -- (stuck in a place where a ship can no longer float; "a ship aground offshore"; "a boat aground on the beach waiting for the tide to lift it")

Sense 3
afloat (predicate), awash (predicate), flooded, inundated, overflowing -- (covered with water; "the main deck was afloat (or awash)"; "the monsoon left the whole place awash"; "a flooded bathroom"; "inundated farmlands"; "an overflowing tub")

INDIRECT (VIA full) -> empty -- (holding or containing nothing; "an empty glass"; "an empty room"; "full of empty seats"; "empty hours")

Similarity of adj afloat

3 senses of afloat

Sense 1
adrift (predicate), afloat (predicate), aimless, directionless, planless, rudderless, undirected -- (aimlessly drifting)
       => purposeless (vs. purposeful) -- (not evidencing any purpose or goal)

Sense 2
afloat (predicate) (vs. aground) -- (borne on the water; floating)
       => adrift (predicate) -- (afloat on the surface of a body of water; "after the storm the boats were adrift")
       => floating -- (borne up by or suspended in a liquid; "the ship is still floating"; "floating logs"; "floating seaweed")
       => waterborne -- (supported by water; "waterborne craft")

Sense 3
afloat (predicate), awash (predicate), flooded, inundated, overflowing -- (covered with water; "the main deck was afloat (or awash)"; "the monsoon left the whole place awash"; "a flooded bathroom"; "inundated farmlands"; "an overflowing tub")
       => full (vs. empty) -- (containing as much or as many as is possible or normal; "a full glass"; "a sky full of stars"; "a full life"; "the auditorium was full to overflowing")

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