unequivocal

admitting of no doubt or misunderstanding; having only one meaning or interpretation and leading to only one conclusion

Not equivocal; not doubtful; not ambiguous; evident; sincere; plain; as, unequivocal evidence; unequivocal words.

Latin 'unus' (one) + 'equivocus' (doubtful)

“There is more of you--and less of you, in spots, very likely--than you know. --The Member gave a slight but unequivocal start just here.”

— Oliver Wendell Holmes, Complete Project Gutenberg Oliver Wendell Holmes, Sr. Works

Anya, while browsing markets near Abuja, spotted a vendor selling "miracle beans" for weight loss. When she asked if they really worked, he gave her an unequivocal wink and a bag of peanuts.

Under the ancient torii gate at Fushimi Inari Taisha, Ravi watched as a shinto priest stamped an unequivocal red seal onto the wooden talisman, leaving no room for any doubt or misinterpretation about its sacred purpose.

“This discovery was unequivocal evidence that the universe has changed radically over time (for example, via the Big Bang).”