Antonyms of adj screw-loose

1 sense of screw-loose

Sense 1
screw-loose, screwy -- (not behaving normally)

INDIRECT (VIA insane) -> sane -- (mentally healthy; free from mental disorder; "appears to be completely sane")

Similarity of adj screw-loose

1 sense of screw-loose

Sense 1
screw-loose, screwy -- (not behaving normally)
       => insane (vs. sane) -- (afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter")