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  • Hyphenation: ra‧pu
  • Rhymes: -ɑpu
  • IPA(key): [ˈrɑpu]

Alternative forms[edit]



  1. A European crayfish, noble crayfish, broad-fingered crayfish, Astacus astacus.
  2. Any other species of crayfish, especially the signal crayfish, Pacifastacus leniusculus.
  3. A crab.
  4. Any unspecified species of Decapoda.


Inflection of rapu (Kotus type 1/valo, p-v gradation)
nominative rapu ravut
genitive ravun rapujen
partitive rapua rapuja
illative rapuun rapuihin
singular plural
nominative rapu ravut
accusative nom.? rapu ravut
gen. ravun
genitive ravun rapujen
partitive rapua rapuja
inessive ravussa ravuissa
elative ravusta ravuista
illative rapuun rapuihin
adessive ravulla ravuilla
ablative ravulta ravuilta
allative ravulle ravuille
essive rapuna rapuina
translative ravuksi ravuiksi
instructive ravuin
abessive ravutta ravuitta
comitative rapuineen

Usage notes[edit]

Originally and still to most Finnish speakers the word rapu means primarily the species Astacus astacus as it is the only indigenous decapod crustacean of significant size in Finland. The meaning has gradually expanded, and currently "Astacus astacus" is often called jokirapu, especially if there's a risk of confusion.


Derived terms[edit]

See also[edit]