Wiktionary
doubteth
vb. (context archaic English) (en-third-person singular of: doubt)
Usage examples of "doubteth".
Or it beginneth at some saying of another, of whose ability to know the truth, and of whose honesty in not deceiving, he doubteth not.
If, then, Genesis is silent as to anything that God has made, which, however, neither sound faith nor unerring understanding doubteth that God hath made, 1069 let not any sober teaching dare to say that these waters were co-eternal with God because we find them mentioned in the book of Genesis.