Having no bones, or soft and flexible like something without a skeleton.
From Old English 'ban' (bone) plus the suffix '-less' meaning 'without.' The term literally means 'without bones' and can describe both literal boneless animals (like jellyfish) and metaphorically something limp or weak.
Jellyfish have been boneless for over 500 million years, making them some of Earth's most successful creatures—they're so adaptable they can turn themselves 'inside out' and live nearly forever!
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