8 letters · 14 points in Scrabble
adjective relating to or of the nature of a legal trust (i.e. the holding of something in trust for another)
adjective used as a fixed standard of reference for comparison or measurement
adjective based on trust
originFrom Late Latin fīdūciālis, from fīdūcia (“trust, reliance”) + -ālis, from fīdō (“to trust”).
Etymology from Wiktionary, CC BY-SA 3.0