FIRTH
Meaning of FIRTH in English
/ferrth/ , n. Chiefly Scot.
a long, narrow indentation of the seacoast.
Also, frith .
[ 1400-50; late ME (Scots) firth-, s. of fjorthr FJORD ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012