Antonyms of adj squishy

1 sense of squishy

Sense 1
spongy, squashy, squishy, spongelike -- (easily squashed; resembling a sponge in having soft porous texture and compressibility; "spongy bread")

INDIRECT (VIA soft) -> hard -- (resisting weight or pressure)

Similarity of adj squishy

1 sense of squishy

Sense 1
spongy, squashy, squishy, spongelike -- (easily squashed; resembling a sponge in having soft porous texture and compressibility; "spongy bread")
       => soft (vs. hard) -- (yielding readily to pressure or weight)