Synonyms of the word

steadfastly

• adv. In a steadfast manner; firmly; with conviction; resolutely.

firm

• n. (Britain, business) A business partnership; the name under which it trades.
• n. (business, economics) A business enterprise, however organized.
• n. (slang) A criminal gang, especially based around football hooliganism.
• adj. steadfast, secure, hard (in position).
• adj. fixed (in opinion).
• adj. solid, rigid (material state).
• v. (transitive) To make firm or strong; fix securely.
• v. (transitive) To make compact or resistant to pressure; solidify.
• v. (intransitive) To become firm; stabilise.
• v. (intransitive) To improve after decline.
• v. (intransitive, Australia) To shorten (of betting odds).
• v. (transitive, Britain, slang) To select (a higher education institution) as one's preferred choice, so…

firmly

• adv. (manner) In a firm or definite or strong manner.
• adv. (manner) Securely.

unwaveringly

• adv. (manner) In an unwavering manner.
• adv. (frequency) consistently, staunchly.