“Before one knows” in Japanese
Short answer
Before one knows in Japanese is “何時しか” (itsushika). Full meaning: before one knows, unnoticed, unawares.
Other ways to say “Before one knows” in Japanese
何時かしら
itsukashira before one knows, before one becomes aware of, unnoticed, unawares
いつの間にか
itsunomanika before one knows, before one becomes aware of, unnoticed, unawares
Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.