to speak very softly or quietly, usually to avoid being overheard by others who are nearby

ささやく, 囁く
to speak in a low, soft voice, often in a way that is difficult to hear or understand

ささやく (sasayaku), 小声で話す (kogoe de hanasu)
to speak in a low or unclear voice, often so that the words are difficult to understand

つぶやく, ぼそぼそ言う
to repeat or perform something again, often to make it clearer, better, or to emphasize specific points

反復する, 繰り返す
to make audible sounds without necessarily forming clear or meaningful words

発する (はっする), 口にする (くちにする)
to pronounce or utter something in a clear and precise way

はっきりと発音する, 明瞭に述べる
to say a word or words incorrectly, especially with regards to the proper pronunciation

誤って発音する, 発音を間違える
to talk rapidly and incoherently, making it hard for others to understand what is being said

たわごとを言う, 熱弁をふるう
to make a sudden, uncontrolled vocal sound as a reaction to an emotion

放つ(はなつ), 叫ぶ(さけぶ)
to shout or speak suddenly and strongly, often expressing a strong emotion

叫ぶ (さけぶ), 叫び上げる (さけびあげる)
to release a long deep audible breath, to express one's sadness, tiredness, etc.

ため息をつく, 息をつく
to speak with involuntary repetitive sounds or interruptions in the flow of speech

吃音する (きつおんする), どもる
