Positively
来自Big Physics
late Middle English: from Old French positif, -ive or Latin positivus, from posit- ‘placed’, from the verb ponere . The original sense referred to laws as being formally ‘laid down’, which gave rise to the sense ‘explicitly laid down and admitting no question’, hence ‘certain’.
wiktionary
positive + -ly
etymonline
positively (adv.)
mid-15c., "in a definite way, expressly," from positive (adj.) + -ly (2). Meaning "absolutely" is from 1777.
