rigid

Describe something as rigid if it's really stiff and not very flexible, like a super-strict practice schedule or an unbending, uncomfortable mattress.

The adjective rigid is actually related to the Latin word frigus, which means “cold.” So think of a rigid icicle or a rock-hard igloo to help you remember what rigid means. You can also use it to describe something that's particularly strict or unable to change, like the stubborn views of a person who just won't consider another perspective.

DEFINITIONS OF: rigid

1

adj incapable of or resistant to bending

“a rigid strip of metal”
“a table made of rigid plastic”
Synonyms:
stiff
inflexible
resistant to being bent

adj fixed and unmoving

“a face rigid with pain”
Synonyms:
fixed, set
nonmoving, unmoving
not in motion

adj incapable of compromise or flexibility

Synonyms:
strict
intolerant
unwilling to tolerate difference of opinion

adj incapable of adapting or changing to meet circumstances

“a rigid disciplinarian”
Synonyms:
inflexible, unbending
unadaptable
not adaptable

adj designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure

Synonyms
semirigid
having a form maintained by a rigid internal structure as well as by internal gas pressure
Antonyms:
nonrigid
designating an airship having a shape maintained only by internal gas pressure and without a supporting structure
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