This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Fixed or unchanging; steady.

adj. Firmly loyal or constant; unswerving. See Synonyms at faithful.

adj. Fixed or unchanging; steady.

adj. Firmly loyal or constant; unswerving.

adj. Firmly fixed or established; fast fixed; firm.

adj. Not fickle or wavering; constant; firm; resolute; unswerving; steady.

Firm; firmly fixed or established in place or position.

Firm; unyielding; unwavering; constant; resolute.

Steady; unwavering; concentered.

Synonyms Stanch, stable, unflinching.

adj. marked by firm determination or resolution; not shakable

adj. firm and dependable especially in loyalty

"So far, President Obama has been right to remain steadfast on a complete settlement freeze as outlined in the roadmap."

resolute    constant   

steadfastness    steadfastly   

firm    constant    resolute    unswerving    steady    fixed   

resolute    sincere    unselfish    staunch    unswerving    unflinching    uncompromising    steady    ardent    untiring