Antonyms of adj squeaky

1 sense of squeaky

Sense 1
screaky, screechy, squeaking, squeaky, squealing -- (having or making a high-pitched sound such as that made by a mouse or a rusty hinge)

INDIRECT (VIA high) -> low, low-pitched -- (used of sounds and voices; low in pitch or frequency)

Similarity of adj squeaky

1 sense of squeaky

Sense 1
screaky, screechy, squeaking, squeaky, squealing -- (having or making a high-pitched sound such as that made by a mouse or a rusty hinge)
       => high (vs. low), high-pitched -- (used of sounds and voices; high in pitch or frequency)