r 1 a 1 i 1 n 1 p 3 r 1 o 1 o 1 f 4
9 letters · 14 points in Scrabble
Meaning
adjective not permitting the passage of water
originEtymology tree Proto-Indo-European *Hréǵʰ-der. Proto-Indo-European *Hréǵʰnos? Proto-Germanic *regną Proto-West Germanic *regn Old English reġn Middle English reyn English rain English -proof English rainproof From rain + -proof.
Etymology from Wiktionary, CC BY-SA 3.0