Surely
Certainly, Without Exception, Always, Definitely
adverb
かならず
必ず (かならず) Surely, Certainly, Without Exception, Always, Definitely
確かに (たしかに) Certainly, Surely
畏まりました (かしこまりました、kana only、not on WK) Certainly!
紛れもない (まぎれもない) Unmistakable, Indisputable, Obvious
患う (わずらう) To Be Afflicted With, To Suffer From
None