EXAMPLES FROM THE WEB FOR FIN
You can't go nowhere's, my frien's and bredren, but Deff 'll fin' you.
I heard him mutter as he neared the boat-house where Fin and I were stowing cargo.
Set a large turbot pan on the fire, and when it boils dip a fin into it for a minute, then take it out and peel it very clean.
Fin'lly he says: "Is this you, or had I better quit and try another pipe?"
Fin'lly she finished up with a regular howl, you might say, of rage.
Just then a hungry warckel blocked the gnarble with his fin.
You come 'long now wit' Ol' Bat, an' git de hoss, we gon' fin'.
There's a little white sloop—an' some one in it—at Shark's Fin Ledge a'most.
As they stood by one they saw the fin of a trout in the obscurity.
But when I'm not findin' fin or feather o' the boat, I'm not knowin' what to think about un.
Old English finn, from Proto-Germanic *finno (cf. Middle Low German vinne, Dutch vin), perhaps from Latin pinna "feather, wing" (see pin (n.)); or, less likely, from Latin spina "thorn, spine" (see spike (n.1)).
U.S. underworld slang sense of "$5 bill" is 1925, from Yiddish finif "five," from German fünf (see five) and thus unrelated. The same word had been used in England 1868 to mean "five pound note" (earlier finnip, 1839).