Of an immaterial thing: rooted, established.
Originally: having roots. Later also: (of a fungus) having rootlike structures at the base of the stipe.
Today’s NYT Connections Answers Mar 28, #291 - Daily Updates & Hints
Today’s Wordle Answer Mar 28 #1013- NYT Wordle Hints & Updates
NYT Mini Crossword Answers Today - The Mini for Mar 28 Solved