What is the meaning of the word "مواخر" (mawākhir) and its singular form in verse 14 of Surat An-Nahl? And is the word "الفلك" (al-fulk) singular or plural, and what is its singular or plural form? And is the Hadith "Do not ride the sea except as a fighter or a pilgrim" authentic, and is it permissible to ride the sea for fishing, even though the verse encourages riding the sea for fishing?

The noble verse: ﴿And He it is Who has subjected the sea (to you), that you may eat thereof fresh tender meat (fish), and that you may bring forth out of it ornaments to wear. And you see the ships ploughing through it, that you may seek (thereby) of His bounty and that you may give thanks.﴾ [An-Nahl: 14].

"Al-Makhr" is the cleaving of water and the sound accompanying the ship's movement, and "mawākhir" means coming and going or sailing. "Al-Fulk" is a plural noun with no singular form from its own word, and it can be singular and plural with the same word. The mentioned Hadith (definition) is weak, and Allah has bestowed His favor upon His servants by subjecting the sea for fishing and riding, which is proof of the permissibility of sailing the sea absolutely.