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