Antonyms of adj unattached

3 senses of unattached

Sense 1
unattached -- (not fastened together)

INDIRECT (VIA unconnected) -> connected -- (joined or linked together)

Sense 2
unattached (vs. attached), uncommitted -- (not associated in an exclusive sexual relationship)

attached (vs. unattached), committed -- (associated in an exclusive sexual relationship)
        => bespoken, betrothed -- (pledged to be married; "the engaged couple")
        => intended -- (future; betrothed; "his intended bride")
        => involved -- (emotionally involved)

Sense 3
free-swimming, unattached -- ((of animals) able to swim about; not attached)

INDIRECT (VIA vagile) -> sessile -- (permanently attached to a substrate; not free to move about; "sessile marine animals and plants")

Similarity of adj unattached

3 senses of unattached

Sense 1
unattached -- (not fastened together)
       => unconnected (vs. connected) -- (not joined or linked together)

Sense 2
unattached (vs. attached), uncommitted -- (not associated in an exclusive sexual relationship)
       => unengaged, unpledged, unpromised -- (not promised in marriage; "continued seeing him but on an unengaged basis")

Sense 3
free-swimming, unattached -- ((of animals) able to swim about; not attached)
       => vagile (vs. sessile) -- (having freedom to move about; "vagile aquatic animals")