How to say "positively" in Japanese

• 必ずかならずJLPT N4approx.Common
  adverbCovers 'positively' in the sense of 'certainly, without fail, necessarily', as in promising that something will positively happen. This is the natural choice when 'positively' simply stresses certainty or inevitability.
  あの歌うたは必かならずヒットするよ。↗

  That song's bound to be a hit.
• 断じてだんじてCommon
  adverbCovers 'positively' only in emphatic declarations, most typically negative ones such as 'positively refuse' or 'positively not'. For this emphatic sense it works well, but it is not the word for 'positively' meaning certainly or encouragingly.
  彼かれは断だんじて紳士しんしなどではない。↗

  He is anything but a gentleman.

Use 「必ず」 for 'positively' meaning 'certainly, without fail', and 「断じて」 only for emphatic, often negative assertions like 'positively not'.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 必ずかならずalways
• 断じてだんじてabsolutely
• ぐいぐいwithout hesitation