“Without one's knowledge” in Japanese
Short answer
Without one's knowledge in Japanese is “闇闇” (yamiyami). Full meaning: without one's knowledge, easily.
Other ways to say “Without one's knowledge” in Japanese
知らぬ間に
shiranumani before one knows it, before one realises, without one's knowledge, without noticing
知らない間に
shiranaiaidani before one knows it, before one realises, without one's knowledge, without noticing
知らないうちに
shiranaiuchini before one knows it, before one realises, without one's knowledge, without noticing
Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.