rigid, stiff (adj)

incapable of or resistant to bending

"a rigid strip of metal"; "a table made of rigid plastic"; "a palace guardsman stiff as a poker"; "stiff hair"; "a stiff neck"

rigid, strict (adj)

incapable of compromise or flexibility

inflexible, rigid, unbending (adj)

incapable of adapting or changing to meet circumstances

"a rigid disciplinarian"; "an inflexible law"; "an unbending will to dominate"

rigid (adj)

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

fixed, set, rigid (adj)

fixed and unmoving

"with eyes set in a fixed glassy stare"; "his bearded face already has a set hollow look"- Connor Cruise O'Brien; "a face rigid with pain"

rigid (Adjective)

Stiff, rather than flexible.

rigid (Adjective)

Fixed, rather than moving.

rigid (Adjective)

Rigorous and unbending.

rigid (Adjective)

Uncompromising.