“Unable to speak” in Japanese
Short answer
Unable to speak in Japanese is “口のきけない” (kuchinokikenai). Full meaning: unable to speak, inarticulate.
Other ways to say “Unable to speak” in Japanese
声にならない
koeninaranai unable to speak (due to overwhelming emotion), soundless, mute
口がきけない
kuchigakikenai unable to speak, inarticulate, mute, speechless, tongue-tied
Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.