fin

name

1. commune in the Somme department in France

noun

1. Initialism of facility ID number.
2. Initialism of force identification number.

verb

Etymology: From Middle English fin, from Old English finn, from Proto-Germanic *finnō, *finǭ (“dorsal fin”) (compare Dutch vin, German Finne, Swedish finne, fena), from Proto-Indo-European *(s)pīn- (“backbone, dorsal fin”) (compare Old Irish ind (“end, point”), Latin pinna (“feather, wing, fin”), Tocharian A spin (“hook”).

1. To cut the fins from a fish, shark, etc.
2. (Of a fish) to swim with the dorsal fin above the surface of the water.

   “When you spot him finning just under the surface, you move up quietly and present [...] bait, usually a squid.”

3. To swim in the manner of a fish.

   “A neutrally buoyant diver does not need to fin to maintain depth.”

4. To provide (a motor vehicle etc) with fins.