カフェインだろう
kafeindarō
1. Probably caffeine.
★ Common
Noun
#930896
1. Probably caffeine.
1. caffeine
1. seems; I think
2. right?; don't you agree?
1. Probably okay.; It'll probably be alright.
1. Caffeine; Of caffeine
1. With caffeine; By means of caffeine
1. Unfortunately likely.; Probably regrettable.
1. Not quite.; Probably not.
1. How old could they be?; Probably around… (age)
1. Probably good at it.; Likely to succeed.