What is meant by اتُّقِيَ لِفُحْشِهِ‏. and مُتَفَحِّشًا?

> "A'isha, the worst of people are those who are feared on account of their bad language.'" قَالَ‏:‏ يَا عَائِشَةُ، إِنَّ مِنْ شَرِّ النَّاسِ مَنِ اتُّقِيَ لِفُحْشِهِ‏. Reference: https://sunnah.com/adab/16/6 In the Hadith above, does ‏اتُّقِيَ لِفُحْشِهِ‏. refer only to sexual bad words or any bad word in general (I.e. sh#t)? Also, what does مُتَفَحِّشًا mean as used in the following narrative? >The Prophet (ﷺ) never used bad language neither a "Fahish nor a Mutafahish. He used to say "The best amongst you are those who have the best manners and character." https://sunnah.com/bukhari/61/68