It's an archaic word, often used in literature and poetry, and it's most famously associated with the author Mark Twain, who adopted the pen name from the riverboat pilots' call "mark twain," meaning "two fathoms deep."
It's an archaic word, often used in literature and poetry, and it's most famously associated with the author Mark Twain, who adopted the pen name from the riverboat pilots' call "mark twain," meaning "two fathoms deep."