troppa

Borrowed from Russian тропа (tropa).

troppa

path, trail
- 1936, L. G. Terehova, V. G. Erdeli, translated by P. I. Maksimov and N. A. Iljin, Geografia: oppikirja iƶoroin alkușkoulun neljättä klaassaa vart (toine osa), Leningrad: Riikin Ucebno-Pedagogiceskoi Izdateljstva, page 103:
  Tropalt, mitä mööt möö laskiisimma, näkyi kylä.
  From the path, along which we descended, a village became visible.

More information Declension of (type 3/koira, pp-p gradation), singular ...

Ruben E. Nirvi (1971), Inkeroismurteiden Sanakirja, Helsinki: Suomalais-Ugrilainen Seura, page 598
Arvo Laanest (1978), Isuri keele ajalooline foneetika ja morfoloogia [The historical phonology and morphology of the Ingrian language]‎, Tallinn, page 27

Declension of troppa (type 3/koira, pp-p gradation)
	singular	plural
nominative	troppa	tropat
genitive	tropan	troppiin
partitive	troppaa	troppia
illative	troppaa	troppii
inessive	tropas	tropis
elative	tropast	tropist
allative	tropalle	tropille
adessive	tropal	tropil
ablative	tropalt	tropilt
translative	tropaks	tropiks
essive	troppanna, troppaan	troppinna, troppiin
exessive¹⁾	troppant	troppint
¹⁾ obsolete ^) the accusative* corresponds with either the genitive (sg) or nominative (pl) ^) the comitative** is formed by adding the suffix -ka^? or -kä^? to the genitive.

Ingrian