To use a very unscientific term, the earth is squishable.
Source: wiktionary
Squishable
/ˈskwɪʃəbəl/
Synonyms for "squishable"
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Sample sentences
2 total sentences available.
On group trips, we like to bring a squishable football. It's light (just a few ounces), packable, and universally popular: Who doesn't love a game of two-hand touch in the great outdoors?
Source: wiktionary