formidable (suomeksi)

pelkoa tai kunnioitusta herättävä (a)
mahtava (a: causing fear, dread, awe or admiration as a result of size, strength, or some other impressive quality)
hurja (a)
hirmuinen (a)
pelottava (a)
valtava (a: causing fear, dread, awe or admiration as a result of size, strength, or some other impressive quality)
vaikuttava (a: causing fear, dread, awe or admiration as a result of size, strength, or some other impressive quality)