fidens

animosus – ardent, courageous, furious, passionate, undaunted, wrathful
ferox – arrogant, courageous, headstrong, spirited, unbridled, warlike, wild
fortis – brave, chance, courageous, fortune, luck, powerful, robust, steadfast, strong, valiant
indubitanter – confident, without doubts, without hesitation

ficus – fig tree
fidelis – faithful, loyal, true, untranslated
fidelitas – fidelity, homage, loyalty
fides – assurance, belief, confidence, engagement, faith, lyre, promise, protection, reliance, string, trust, trustworthiness, truth, word of honor
fiducia – assurance, confidence, reliance, trust, trustworthiness
fiducialiter – confidently
fidus – trusty
fiendo – it will be made, same as faciendo, the making
fieri – be done, be made, become
filia – daughter

fi·dens[1]