RIGID
rigid, stiff
(adjective) 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
(adjective) designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure
inflexible, rigid, unbending
(adjective) incapable of adapting or changing to meet circumstances; “a rigid disciplinarian”; “an inflexible law”; “an unbending will to dominate”
fixed, set, rigid
(adjective) 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, strict
(adjective) incapable of compromise or flexibility
Source: WordNet® 3.1
Etymology
Adjective
rigid (comparative rigider or more rigid, superlative most rigid)
Stiff, rather than flexible.
Synonym: inflexible
Antonym: flexible
Fixed, rather than moving.
Antonym: moving
Rigorous and unbending.
Uncompromising.
Antonym: compromising
Noun
rigid (plural rigids)
A bicycle with no suspension system.
Source: Wiktionary
Rig"id, a. Etym: [L. rigidus, fr. rigere to be stiff or numb: cf. F.
rigide. Cf. Rigor. ]
1. Firm; stiff; unyielding; not pliant; not flexible.
Upright beams innumerable Of rigid spears. Milton.
2. Hence, not lax or indulgent; severe; inflexible; strict; as, a
rigid father or master; rigid discipline; rigid criticism; a rigid
sentence.
The more rigid order of principles in religion and government.
Hawthorne.
Syn.
– Stiff; unpliant; inflexible; unyielding; strict; exact; severe;
austere; stern; rigorous; unmitigated.
Source: Webster’s Unabridged Dictionary 1913 Edition