Of a person, or his or her qualities, behaviour, etc. Cf. steely, adj. 4a. Unyielding, inflexible; determined.

Of a person: Stiff, unbending, stubborn; stern, surly. Also of looks, etc.

Of persons. Distant or cold in demeanour; reserved; not affable, familiar, or encouraging; uncomplying, unwilling to accede to a request or desire…

Incapable of being diverted from one's purpose; steadfast, unyielding; = immovable, adj. 2b.

Unbending in temper or purpose; not to be turned from a purpose by persuasion or argument; immovable, inexorable.

In bad sense: Obstinate, intractable, stubborn, rebellious. Obsolete.

Not easily influenced or persuaded; obstinate, stubborn; unconforming. Cf. unpliant, adj. 1.

That cannot be treated with; inexorable.

figurative. In an unfavourable sense: obstinate, stubborn; not amenable to reason. Now rare.

Having a stiff neck. Chiefly figurative of persons, with Biblical reference: Obstinate, stubborn, inflexible, haughty (cf. neck, n.1 phrases 1b)…

Not easily influenced or persuaded; obstinate, stubborn; unconforming. Cf. unpliable, adj. 1.

Having a stout heart; courageous, undaunted; †stubborn, intractable.

Of persons, their actions or attributes.

Unyielding, stiff, rigid; difficult to deal with or eradicate; (Medicine) persistent despite treatment, refractory.

figurative. Obstinate, indisposed to yield; grudging in gifts or concessions. Obsolete.

Unable to be persuaded; not open to persuasion; of fixed opinion, obstinate. Cf. impersuadable, adj.

= inflexible, adj.1

having rigid or sharply defined edges; (also figurative) tough, uncompromising; stark, harsh.

= adamantine, adj. 1a.

Of persons, etc.: Not yielding, surrendering, submitting, or giving way; firm, obdurate, obstinate. Also const. to.

deaf as an adder (see sense 2b).

Of a person, his attributes, etc.: Hardened like steel, insensible to impression, inflexible.

Of persons: Obstinate, inflexible, stubborn.

Extremely strict in the treatment or others; harsh, stern, severe.

Not open to persuasion; of fixed opinion, obstinate, unswayable. Also in early use spec.: unsusceptible or resistant to divine influence or…

Inflexible.

(un-, prefix1 affix 1b.)

(un-, prefix1 affix 1a affix 1b.)

Not flexive; inflexible.

Excessively rigid; too strict, inflexible, or uncompromising.

Not limber; inflexible.

That has assumed a permanent form or condition; immovable, persistent. Of a feeling, attitude of mind: Fixed, settled, immovable. †Of action…

Not complying; incompliant.

(un-, prefix1 affix 4.)

inflexible, obstinate.

Unable to be persuaded (†to do something); not open to persuasion; of fixed opinion, obstinate. Cf. impersuasible, adj. unpersuadable, adj.

Not giving way or departing from a position or principle; unyielding, inflexible, steady. Of feelings, dispositions, etc.

That cannot be put to use or practically dealt with; unmanageable, intractable, unserviceable. Of persons, or their dispositions, etc.: Incapable…

(un-, prefix1 affix 1b.)

unbending, obstinate, proud.

(un-, prefix1 affix 1.)

(un-, prefix1 affix 4.)

Not plastic (in various senses).

Not giving way or departing from a position or principle; unyielding, inflexible, steady. Of persons.

Unwavering, unshakeable, inflexible; esp. (chiefly predicative) refusing to be persuaded or to change one's mind; absolutely convinced that…

Uncompromising, rigid.

Not willing or seeking to compromise; unyielding, unbending; stiff, stubborn. Of persons.

figurative. Hard, insensible to fatigue; rigid, stern, unbending; ‘hard-and-fast’, unyielding, wanting in pliancy or adaptiveness. (Hyphenated.)

figurative. Having or exhibiting impetus, energy, or drive; uncompromising, direct, honest, esp. in providing unpalatable facts or strong criticism.

Of, relating to, or characteristic of a rigorist; strict, inflexible, rigid.

Rigid, strict; solemn, formal.

Of a person: cold, disdainful; strait-laced. Obsolete. rare.

fig. Cramped, rigid.

(un-, prefix1 affix 1b.)

bound with tape; = tape-tied adj.

tied with tape; also figurative, bound by ‘red-tape’, restricted by officialism.

Usually hyphenated or as one word. Adhering to or supporting a severe or inflexible policy, belief, etc., that does not allow concession or…

Resolute in dealing with opposition; vigorously uncompromising; severe; esp. in to get tough (cf. get, v. compounds c). colloquial (originally U.S.).

Characterized by the belief that certain principles are absolute and unconditional; that does not admit of compromise or qualification.

Tough, uncompromising; characteristic of a hard-arse. Cf. hard-arse, adj. 2.

That ‘goes for broke’ (see broke, adj. 3b); characterized by a willingness to risk everything in order to achieve a goal; all-out, uncompromising.

Designating an extreme or pronounced example of something; uncompromising; persistent, entrenched. Also: radical, doctrinaire.

Tough, uncompromising.

Tough, uncompromising.

slang (originally and chiefly North American). Characterized by ruthless, uncompromising methods or dealings; tough, direct.