Antonyms of adj low-necked

1 sense of low-necked

Sense 1
decollete, low-cut, low-necked -- ((of a garment) having a low-cut neckline; "a low-cut neckline")

INDIRECT (VIA necked) -> neckless -- (lacking or apparently lacking a neck)

Similarity of adj low-necked

1 sense of low-necked

Sense 1
decollete, low-cut, low-necked -- ((of a garment) having a low-cut neckline; "a low-cut neckline")
       => necked (vs. neckless) -- (having a neck or having a neck especially as specified (often used in combination))