expression
A katakana expression corresponding to English “how.” In ordinary Japanese questions, use どう or どのように instead; ハウ is mostly limited to English-learning, transcription, titles, or quoted English.
英語の「How are you?」の How は、カタカナで「ハウ」と表される。
The “How” in the English phrase “How are you?” is written in katakana as ハウ.