pre-valence (noun) prevalence: predominance
Sinonime: backbone*, decidedness, decisiveness, doggedness, earnestness, firmness, fortitude, grit, iron will, obstinacy, obstinance, perseverance, persistence, pluck, purpose, purposefulness, purposiveness, resoluteness, resolution, resolve, seriousness, spine, stubbornness, volition, will, will power, willpower