doubtless
//ˈdaʊtləs//
Adverb
doubtlessCanonical form
1
Without doubt; certainly; unquestionably.
She will doubtless succeed in her new job.
2
Probably; presumably; in all likelihood.
She will doubtless arrive before noon.
Antonym
Adjective
doubtlessCanonical form
1
Free from doubt; certain; sure.
She was doubtless of her decision to study abroad.